Product description Features: Product name: Bluetooth 5.0 hands-free car speakerphone Bluetooth: 5.0+EDR Bluetooth frequency: ISM2.4GHz-2.48GHz Effective distance: 10 meter Built-in rechargeable battery: 3.7V, 500mAh Built-in echo cancellation and noise reduction technology. Bluetooth 5.0 fast and stable connection. Built-in rechargeable battery for 20 hours of continuous operation. Connect two mobile phones at the same time. Automatic shut-down after disconnecting for five minutes. Color: black Operation: 1. Charge your Bluetooth in-car speaker: Make sure that your Bluetooth in-car speaker is fully charged before you start using it. Please use micro USB cable and no more than 5V charger to charge it. When the LED is solid red, it's charging. When the LED turns off, it's fully charged 2. Turn On/Off the Bluetooth speaker: Long press the button for 2-3 seconds to turn on the device, you will hear the voice prompt "Power On", the LED will flash quickly. Long press the button for 2-3 seconds to turn off the device. You will hear the voice prompt "Power Off", the LED will turn off 3. Pairing it with your phone: When use the Bluetooth hands-free speaker first time, you need to pair it with your cell phone a. Turn on the device, you will hear voice prompt "Power On" "Ready to pair" b. Activate the Bluetooth function of your phone and search the Bluetooth signals c. Select pairing name of the Bluetooth speakerphone on your phone, and click it to pair(Some phones require entering password"0000"). After paired successfully. You will hear the voice prompt "Bluetooth connected" Before using please read the user manual carefully.