Features: 1. The latest version of the Bluetooth chip, V5.0 + EDR, the output is stability. 2. Voice broadcast all the way. 3. With function of automatic power-on and shut down, which can save worry and labor. 4. 550 mAh battery. 5. The duration of the call is about 10 hours. Handsfree Car Speaker Kit for Cell Phone-Advanced multi-point connection, which can support two mobile phones simultaneously online. Built-in DSP noise suppression and echo cancellation function. Specifications: Bluetooth transmission distance: 10M Speaker: 42W, high-definition stereo sound Size: about 100*60*21mm/3.94*2.36*0.83in Color: Black Charging time: about 2 hours Battery capacity: 550mAH Call time: about 10 hours Standby time: up to 500 hours Bluetooth version: V5.0+EDR Transmission distance: 10M Package Included: 1 x Car charger Notes: 1. Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the pictures. 2. Please allow slight dimension difference due to different manual measurement.