Features: brand new and high quality V5.0+EDR, stable output. Full range voice broadcast. Automatic on/off function, saving effort and care. Siri voice control. 550mA battery, 500 hours long standby. Keep talking for about 10 hours. Built in digital amplifier, greatly improving the volume and sound effect. Advanced multipoint connection, supporting two mobile phones online at the same time. Built in DSP noise suppression and echo cancellation (CVC8.0 dual noise reduction technology). Bluetooth-compatible transmission distance: 10M. Horn: 4 Ω 2W, high-definition stereo. Specifications: Color: Black Charging time: about 2 hours Battery capacity: 550mah Talk time: about 10 hours Standby time: up to 500 hours Version: V5.0 + EDR Transmission distance: 10m Size: approx. 100x60x21mm/3.94x2.36x0.83in Package Includes: 1 x Bluetooth-compatible 5.0 Car Kit 1 x USB car charger 1 x USB charging cable 1 x Visor Clip 1 x User Manual note: Light and different displays may cause the color of the item in the picture to be a little different from the real thing. The measurement allowed error is +/- 1-3cm.