Noise reduction: Built-in echo cancellation and noise reduction technology, Bluetooth 5.0 fast and stable connection Battery: Built-in 500mAh high-capacity battery, which can be used continuously for 20 hours, and the standby time is 100 hours Multi-language: Connect two mobile phones at the same time, support multi-language switching (English, Chinese, French, German, Italian, Japanese, Spanish) Automatic shutdown and automatic connection: The automatic shutdown function will automatically shut down after five minutes of disconnection. Auto-start and connect function, automatically open when you close the door, and connect to the last connected phone One-button operation: One-button answer and end calls, operate Siri and Google Assistant to control the phone, such as making a call or sending a message. As you said, please always pay attention to the road to ensure safety Convenient clip: Use the integrated clip to fix this phone speaker to the sun visor, seat belt, wallet or any location where you want to use hands-free calls, listen to your favorite podcasts or streaming music Specification: Type: Bluetooth hands-free car kit Material: ABS Bluetooth standard: Bluetooth 5.0 + EDR Bluetooth frequency: ISM2.4GHz-2.48GHz Bluetooth working range: 0-10 m Battery: 3.7V 500mAh built-in battery Charging time: 2-4 hours Working time: 20 hours Standby time: 100 hours Size: 12.8 * 5.2 * 1.6cm / 5.03 * 2.04 * 0.63 inches Weight: 140 g / 4.94 ounces