Overview Bluetooth 4.2: Advanced compatibility with most Bluetooth-enabled phones and supports multiple network bands. Magnetic Mounting: Easy clip-on installation to sun visors with secure magnetic adhesion. Hands-Free Calling: Answer, end, or reject calls wirelessly with voice command support. Noise Cancellation: Built-in DSP for echo and noise reduction, ensuring clear calls even at high speeds. Long Battery Life: 100 hours standby with a rechargeable 350mAh lithium battery. Music Playback: Stream audio from phones via Bluetooth with high-fidelity 2W speakers. Auto Pairing: Automatically reconnects to previously paired devices for convenience. Specifications Material: ABS plastic Bluetooth Version: 4.2 Frequency Range: 2.4?2.48 GHz Wireless Range: 10 m Output Power: 2 W Battery: Lithium-ion, 3.7V, 350 mAh Standby Time: 100 hours Charging Time: 2?3 hours Input Voltage: 5V Speaker Size: 35 mm Signal-to-Noise Ratio: ?92 dB Impedance: 4 ? Color: Black Packing List Bluetooth transmitter*1 USB car charger*1 USB charging cable*1 Back clip*1