ModelBt100p FunctionsMp3/fm/usb/aux/hands free; Dimensions:128*110*105mm; Weight:225g Speaker driver:Stereo, 40mm, 4 ohm*2 Speaker output: 5w Frequency response:180hz-20khz Signal-to-noise ratio:;y80db Distortion0.1% Battery charging voltage:5v/1a Working voltage:3.3 -- 5v Battery charging time:3.5-4 hours Battery capacity:800 mah ChipsetRda Interface:Bluetooth, 3.5mm aux, micro usb Operating frequency range:2.4ghz-2.48ghz Bluetooth transmission distance:20 meters Bluetooth compliant:V2.1+edr CertificationCe, rohs, fcc, bqb Package size:145*145*150mm; gw:550g; always neutral packages. We are the oem/odm. As long as the moq can up to 1k, we can make packages and logo as customer's request. Because we always send the packages and mark to other company for helping us produce. If the quantity is too small, our partners will not agree. Help you understand.