... micro mp3 player 2,CE,ROHS, FCC 3,Direct factory 4, OEM also welcome bluetooth headset gifts crafts ,bluetooth headset ... 3) wireless monitoring ChargingA built-in rechargeable Li-ion battery has been equipped in this headset, please charge fully ... Hours* Standby time,240 Hours* Power supply, DC 5V* Battery,rechargeable 460mAh Li-ion battery* Weight,77G * Measurement,15X15X6.5mm * Effective range, ...