Brand e-J Model HF-810 Quantity 1 piece(s) Color Black + silver Material Aluminum alloy Screen Size No Function Bluetooth handsfree + Auto Answer + Voice Prompt + Dual connection + Voice Tone Compatible Cellphone Smart phones with Bluetooth function. Phonebook Capacity No Bluetooth Version 4.0 Transmit Frequency 2.402GHz~2.480GHz Transmt Distance 10 m MIC Effective Distance 0.5~0.8m SNR 80 dB THD 1% Frequency Response No Talk Time 15~16 H Standby Time 1600 H Charging Time 3 H Charger Voltage DC 5.0V / 0.5A Battery Capacity 800 mAh Interface/Port Micro USB External Card Max. Support No BQB Certification No Other Features 1. The latest Bluetooth version (CSR): V4.0 + A2DP compatible with most Bluetooth phones. 2. Supports Hands-free Headset A2DP AVRCP Bluetooth protocol standards. 3. Supports connecting two phones at the same time can memorize up to 8 Bluetooth phone pairing. (The exclusive technology supports connecting two phone and connecting online standby). 4. Built-in DSP noise reduction and echo cancellation functions (the special noise reduction management makes you still clear phone call even opens the car window and drives under 120 yards high speed). 5. Include Hi-Fi 2W loudspeaker and high-sensitivity microphone support stereo music play. 6. Boot auto connection very convenient Voice Tone voice prompt operation clear and easy to use. Packing List 1 x Smart Bluetooth handsfree car kit 1 x Car charger 1 x USB data cable (80cm) 1 x Chinese / English user manual