Features:_x000D__x000D_BT V4.1 + EDR provides a more stable and smooth connection. _x000D_Hi-Fi headphone offers high quality sound performance. _x000D_Support hands-free calling, truly releases your hands and ensures your safety while driving. _x000D_Support for answering, rejecting, hanging up and redialing phone functions. _x000D_Built-in rechargeable Li-ion battery, working hours up to 8 hours, standby time up to 160 hours. _x000D_4.0 type of CSR BT chip, Hi-Fi headset. _x000D_Voice prompt function, it will give sound like "Power on", "Pairing", "Connected", and make it easy to set and process the operation. _x000D_Support for iOS to display the power and to know when to charge. _x000D_In power save mode, it will turn off automatically after 5 minutes if no working device paired. _x000D_DIY design, available to be detachable when you want. _x000D_The low power warning lets you know that the battery is not enough and needs to be recharged. _x000D_The sound reminder function makes it easy to set up the device based on the sound reminder. _x000D_Magic tape design lets you install and detach headphone anytime and anywhere. _x000D__x000D_Specification:_x000D_Condition: Brand New_x000D_BT Version: 4.1 + EDR, CSR_x000D_Frequency: 2.402GHz-2.480GHZ_x000D_Transmission Range: 10-15 meters / 32.8-49.2ft(Depending on the equipment)_x000D_Microphone Transmission Distance: 1m_x000D_Li-ion Battery: 3.7V/500mA_x000D_Playback Time: 15 hours_x000D_Charging Voltage: 5V_x000D_Charging Time: 3 hour_x000D_Delay: 240 hours_x000D_BT Name: BT12_x000D_Color: Black_x000D_Weight: Approx. 180g / 6.3 oz_x000D__x000D_Package list:_x000D_1 * Helmet BT Headset_x000D_1 * Charging Cable_x000D_1 * User Manual 1BT V4.1 + EDR provides a more stable and smooth connection 2Hi?Fi headphone offers high quality sound performance 3Support hands?free calling, truly releases your hands and ensures your safety while driving 4Support for answering, rejecting, hanging up and redialing phone functions 5Built?in rechargeable Li?ion battery, working hours up to 8 hours, standby time up to 160 hours1 * Helmet BT Headset 1 * Charging Cable 1 * User Manual