Even in a very noisy environment, Model-139B still has the ability to determine quickly and precisely the positive and negative polarity of a loudspeaker headphone receiver and every single unit in a loudspeaker system. Model-139B also includes 3 sets of external input terminal and selector which can be used to combine with other instruments, in order to measure the other features of a loudspeaker simultaneously. It is quite suitable for 100% Q.C. testing for loudspeakers in the production line. Loudspeaker Polarity Tester 139B Technical specification: (1) Pulse measuring method. (2) Polarity indicator : (a) Green indicator: Positive polarity with beep sound. (b) Red indicator: Negative polarity with no sound at all. (3) Five touch switches : (a) WF range: Suitable for measuring the polarity of the woofer. (b) M & T range: Suitable for measuring the polarity of midrange and tweeter. (c) EXT.1 to EXT.3: Used to select the instrument connected to the external input terminal. (4) Model-139B can be connected with Model-7116C, to measure the buzz, and rattle of a loudspeaker. Only one operator is needed. (5) Measuring distance: 2 to 4 Cm. from the center point. of the dust cover of the pre-measure loudspeaker. (6) Measuring sensor: Uses ECM. (7) Dimension ( m / m ): 85 ( height ) x 205 ( width ) x 280 ( depth ). (8) Weight: 2.3 Kg. SUNLIGHT AUDIO SWEEPER 7116C Loudspeaker Polarity Tester 139B NOISE GENERATOR 8121C GAUSS METER 138 IMPEDANCE METER 152A DIGITAL HIGH-SPEED Fo METER 7117 C.
Model-8121C uses a logic circuit to generate Pseudo Random Noise , it is the newest and the most advanced design to generate audio white noise. It has a much flatter frequency response than using a diode. Model-8121C has: (1)White noise source.(2)Weighting filters. (3)Built-in power amplifier. (4)�¢?? TRUE RMS �¢?? voltage meter circuit. It can generate five different kinds of noise spectrum, including White Noise, Pink Noise, and three kinds of �¢??Weighted Noise�¢??, that conforms to the following nation�¢??s standards:(1) JIS C5531, IEEE 219, CNS 4785 (2) EIA 426B(3) DIN 45573 1. White Noise: -3dB Bandwidth: 20Hz 100kHz, Roll off:-24dB / Oct. Flatness: �?�±1dB 2. Pink Noise: -3dB Bandwidth: 20Hz�¯�½?20 kHz Roll-off: -24dB / Oct. Crest factor: 4 ( IEEE 219 ) Amplifier: 1.100W output is defined at an unclipped maximum output of sine wave. 2.Frequency response : 20 Hz~20 kHz �±0.2dB; 20 kHz~100kHz �±1dB 3. Output: With permanent short circuit protection. Load Impedance: 3.2
Model no.: kbb-470 Structure: bass reflex enclosure Snr: 91-100db Speaker material: wood Amplification type: passive Usage: karaoke Export markets: global Single 10" kbb-470 Rated power: 100w Max power: 230w Frequency response: 45hz-20khz Rated impedance: 8 Sensitivity: 96 3db(1w/1m) Dimension(l*w*h): 515 330 320mm
such as stripcasting, hddrtechnology; 9. Applications: sensors, motors, rotors, wind turbine, wind generators, speakers, loudspeakers, magnetic hooks, magnetic holder, filters, etc. When inquiring, following information offered will be much appreciated . 1.Type of magnet (material & grade) 2. Quantity (annual and per shipment) 3. Shape and dimensions (drawing if necessary) 4. Direction of magnetization 5. Magnetized or not 6. Details of surface treatment 7. Application if possible 8. Other information or requirements Carton or according to your requirement
Dinosaur eggs we produced have the following functions: New-birthed dinosaur would break the egg and be successfully ovulated; it would shake its head to the up/down/left/rightwards and make sound. Each dinosaur egg has 2 controllers (one for standby), infrared body sensors and loudspeakers. It could also be .
1¡¢microphone: high sensitivity, heart-link shape pointing 2¡¢goose-neck like type microphone can be disassemble, with red-ring indicate light 3¡¢microphone light instruction: turn on the microphone display in red light instruction when display in green indicated the delegate¡¯s speech is limited 4¡¢microphone switch: useful for turning on and turning off the microphone 5, forbid key: can forbid or cancel the speaking delegate (rx-c2700 has this function) 6, built-in loudspeaker Carton
2.0 high-end mini acoustics expert: Function parameters: Sound system: 2.0 stereo usb system: usb2.0 The speaker power: 5.0 w loudspeaker diameter: 66 mm Horn resistance: the frequency response: 20 hz - 20 khz Sensitivity: 80 db noise ratio: 80 bd Size: length: 170 mm width: 108 mm height: 180 mm 52.5mm*36.5mm*51.5mm
Ti omap3530 cortex a8 600mhz processor High quality 7" led backlight panel with touchscreen, 800 x 480 resolution Function keys for 5%~100% brightness control Built-in antenna , loudspeaker Ip65 dustproof and waterproof seals Rugged aluminum enclosure and fanless design Wide range 10 to 24v dc input acceptable Wide range -20~70¡æ operating temperature Vesa standard for flexible mounting kits applications Expansion module£ºwifi, gps, bt , 3g
Intel atom n450 1.66 ghz processor Highquality8.4''led backlight panel withtouchscreen (800x600)resolution Function keys for 0%-100% brightnesscontrol Built-in antenna , loudspeaker Ip65dustproof and waterproof seals Rugged aluminum enclosure and fanless design Stable and wide range -9¡«30vdc input Wide range -20~60¡æ operation temperature Expansion module£ºwifi, gprs, gps, 3g, bt
Intel atom n450 1.66 ghz processor Highquality 12.1''led backlight panel withtouchscreen (1024x768)resolution Function keys for 0%-100% brightnesscontrol Built-in antenna , loudspeaker Ip65dustproof and waterproof seals Rugged aluminum enclosure and fanless design Stable and wide range 9-30vdc input Wide range -30~70¡æ operation temperature Expansion module£ºwifi, gprs, gps, 3g, bluetooth. Applications : ports&yards , vehicles , fleet management, logistics , fork lift .
GSM850/900/1800/1900 Single sim card single standby 7 inch QVGA Capacitive touch screen Dual Camera 0.30MP+2.0MP;Battery 4500mAh; Multi-languages(Neutral English¡ OEM customed ) TV /Wifi(WiFi 802.11b/g/n)/mp3/mp4/FM/BT/4G+4G Loudspeaker¡Ó30/20 197*115.7*14.5MM Color:Black/White 1Battery, 1Charger, 1Earphone,1USB Cable, 1User Manual with box.
Features All to one design Small beautiful appearance Strong ability of processing fetal heart signals Invulnerable to outside interference Power with dry batteries (9V) The probe taking the principal of fetal ultrasound to collect the fetal heart beat signals of fetus Broadcast the fetal heartbeat sound through headphones or out with loudspeaker Can transmit the real-time sound of fetal heartbeat to the computer saving for memory by specialized data lines.
Model: FLY2008 1. Super wide screen 3.0 inch, 16:9 WQVGA 2. Dual SIM cards,single standby 3. Double camera 4. Bluetooth 5. Simulative TV( optional) 6. FM loudspeaker (optional) 7. Super long standby time (2000mAh) 8. Vast volume of phone book (incoming call firewall) 9. Mobile Phone QQ Chatting 10. Reference Size: 116.0*53.3*17.2 Reference Size: 116.0*53.3*17.2
Professional cable tacker For cable staples 1014mm Durable allsteel construction Painted finish Normalmax power impact control, maximum setting for long staples or hard materials. Recoilless for comfortable operation Suitable for lowvoltage (max 50v) cables up to 4.5mm or 6mm diameter. Two size cable staples crown 6.2mm or 7.6mm available. Ideal for tv, alarm, loudspeaker, security and compouter network cable. Standard packing:6pcs/box;24pcs/carton Nw:23.5kgs; gw:24.5kgs; volume:1.75cuft
Shenzhen Wondhope Electric Co., Ltd Is A Hi-tech Enterprise For Manufacturing The Pptc ( Polymer Positive Temperature Coefficient ). As A Professional Manufacturer, Wondhope Is Able To Develop And Produce With Advanced Manufacturing And Testing Equipments. The Whptc Resettable Fuses Are Widely Used In The Communications, Automotive Electronics, Mini-motors Loudspeaker, Electronic Instrumentation, And A Wide Wariety Of Other Electronic Equipment. The Corporation Have Been Awarded The Certificate Of The Iso9001:2000(quality Management System Standards). The Packing Is Diffrent According To The Product Series.
Functions: bluetooth ,MIC,TWS,MICRO SD,USB,AUX,FM,solar charge loudspeaker: 66mm 4 8W*1 material: ABS+rubber oil+iron net battery:1200mAh play time:2H accessories:charge cable*1 , belt*1
1 Operating System Andriod 4.0 2 CPU Boxchip A10 3 Language Multinational 4 Touch panel 10" Capacitive multi-point touch 5 Battery capacity 6000mAh 6 Memory DDR 3 , 1G 7 WIFI 802.11b/g/n 8 Back Camera 2.0M 9 Before Camera 2.0M 10 Software Support APK sofeware installation 11 Loudspeaker Built-in high-power loudspeaker 12 System Support Windows2K/XP/Vista/Windows7/Linux2.4/MAC OS 10.4 systems 13 Colour Black and white 14 TF-card Up to 32GB 15 Flash memory support flash build in 8GB, 16GB etc 16 Flash Support flash 10.3 and online videos 17 G-sensor Support Horz/Vert Sensor (G-sensor) 18 USB high speed transmission 19 Media Play 1080P AVI, MPG, MKV, RM, RMVB, MP4, MOV, VOB, DAT, FLV, TS, 3GP, WEBM(vp8), etc. 20 Audio Play MP3, WMA, WAV, OGG, APE, OGA, FLAC, AAC, W4A, 3GP, etc. 21 Photo browser JPG. JPEG, BMP, GIF, PNG, JFIF with zooming and rotation function. 22 Dimension 242mm*189mm*12mm. Cartons.
Advantages of the Ultrasonic Directional Speaker: 1. Strong Directionality: Achieves the best voice control point and maximum reduction in noise pollution. 2. Easy Installation: Can be installed at any angle. Ultrasonic waves are only a few millimeters in length. They are much smaller than traditional speakers and can produce a narrow, nearly linear beam of sound. Ultrasonic wave directional loudspeakers can travel through the air like a flashlight beam, controlling the sound in a particular area. Sound can be enhanced in a specific area and diminished everywhere else. Z
Headphones are a pair of small loudspeakers that are designed to be held in place close to a user's ears. They are also known as earspeakers, earphones or colloquially, cans. The alternate in-ear versions are known as or earbuds but also can be referred to as earphones. In the context of telecommunication, a headset is a combination of headphone and microphone. Headphones either have wires for connection to a signal source such as an autio amplifier, radio, cd player, portable media player, mobile phone, electronic musical instrument, or have a wireless receiver, which is used to pick up signal without using a cable. All dimensions
Selling point: mtk8377, cortex-a9, 1.2ghz dual core processor, andriod 4.1 version, dual camera( back camera: 2.0mp; front camera: 0.3mp), wifi, 3g calling oint touch screen Resolution 10.1 inches, 1024x600pixels, Sound loudspeaker yes 3.5mm jack yes Date wlan wi-fi 802.11 b/g/n Bluetooth yes Gps yes Usb slot yes Camera primary 2.0mp back camera , 0.3mp front camera Battery capacity 6000mah battery Standby time up to 4.5h-5h movie playback New
