Features: Noise Reduction Built-in echo cancallation and noise reduction technology, Bt 5.0 fast and stable connection. Rechargeable Battery Built-in rechargeable large capacity 500mAh battery inside for 20 hours of continuous operation, standby time is 100 hours. Multiple Languages Connect two mobile phones at the same time, Support multiple languages switching (English, Chinese, French, German, Italian, Japanese, Spanish). Auto Shut Down and Auto Connect Automatic shut-down function, shut down automatically after disconnecting for five minutes. Automatic boot and connection function, Automatically turn on after closing the car door and connect to the last connected phone. One-click Operation One-click for answering and ending phone calls, support Siri and Google Assistant function to control your phone, such as make calls or send messages. Keep your eyes on the road as you speak to ensure safety. Convenient Clip On Use the integrated clip to secure this speaker phone to sun visor, seat belt, purse or anywhere you would like to enjoy hands free calling, listening to your favorite podcast, or streaming music. Specifications : Type: Bt Car Speakerphone Material:ABS Color: Black Quantity: 1pc Bt standard: V5.0+EDR Bt frequency: ISM2.4GHz-2.48GHz Bt working range: 0-10m Battery: Built-in rechargeable battery 3.7V 500mAh Charging time: 2-4 hours Working time: 20 hours Standby time: 100 hours Size: 12.8*5.2*1.6cm/5.03*2.04*0.63in Weight: 140g/4.94oz Package: 1* Bt Car Speakerphone 1* USB Cable 1* Steel Clip 1* User Manual