Twinpa S9A IS THE BETTER CHOICE IN BLUETOOTH HEADPHONES? - TRUE HIGH DEFINITION SOUND Enjoy Stereo Sound with High Definition and unparalleled rock-solid bass with ultra crisp treble. - BLUETOOTH V4.1 SKIP-FREE WIRELESS UP TO 30 FEET - LONGER BATTERY LIFE â?? Better battery efficiency with up to 8 HOURS of play. - STYLISH AND ERGONOMIC DESIGN Cordless Headphones - PASSIVE NOISE CANCELLATION - SECURE COMFORT FIT - CONTROL CALLS - Hands Free Calling and Easy Controls for volume, skip, pause and play. - COMPATIBLE WITH ALL BLUETOOTH ENABLED DEVICES Connect with two smart phones at once. Technical specification: - Bluetooth Specification: 4.1+EDR - IPX7 Waterproof Rating - Noise Reduction: CVC6.0 - Transmission Distance: 30ft - Battery: Lithium-ion Polymer 85mAh - Frequency Response: 20 -22kHz - Charging Port: Micro USB - Charging Time: 1-2 Hours - Playback Time: Up to 8 Hours - Standby Time: 240h What's in the Box: 1XTwinpa Bluetooth Headphones, 1XUSB Charging Cable; 1XUser Manual, 1X Cable Clip,