Features: brand new and high quality Support caller number voice broadcast. The operating frequency range: ISM band(2.4-2.48GHZ). Wireless range up to meters. Support hands-free,support Siri,support music,support audio function. Equipped with high-definition 2W speaker,and high sensitivity microphone. It is convenient to take it off or fix it. With its Clip, the speakerphone can be attached to your car's for sun visor quickly and firmly. Specifications: Bluetooth-compatible version: V4.1 + EDR Battery type: li-ion 3.7V, 300mah Call time: 20 hours Standby time: up to 1000 hours Charging time: 2-3 hours Size: approx. 130x49x15/5.12x1.93x0.59in Package Includes: 1 x Bluetooth-compatible Car Kit 1 x Car Charger 1 x Micro 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.