Bluetooth Hands-free Speaker: Let you never miss a call while driving. Built-in 3W speaker for hands-free answering to ensure safe driving without breaking traffic rules. Voice Control: Double click the button M to activate Siri or Google Assistant, and then give voice commands to control the car Bluetooth speaker, such as making calls or playing music. Easy to Use: Just clip it to your car sun visor with the magnetic back clip and connect it with your phone via Bluetooth. Supports connecting to 2 mobile phones. Clear Loud Sound: With Noise Reduction and Echo Cancellation technology, it brings you a clear call experience. Long press the button +/- to increase or decrease the volume. Tip: Keep your phone away from the Bluetooth car speaker while on a call. Support TF Card: Built-in TF card slot, you can insert your TF card to play music to eliminate fatigue. We provide 18 months warranty service and welcome any suggestion you have for the Bluetooth car speakerphone.