Technical specification: Bluetooth Specification: 4.1+EDR Bluetooth Chips:CSR8645 Bluetooth Profile: HFP1.6?HSP1.2?AVRCP1.4?A2DP1.2 RF Range: 10m Noise reduction: CVC6.0 Supports IPHONE battery display Stand-by time: about 500 hours Calculating Conversation Time: about 8 hours Charging time: About 2 hours Dimension (L×W×H):1.12×0.85×0.46inch Weight: 0.58ounces Accessories List: 1X Sport Bluetooth Stereo Earphone. 1X User Manual. 1X USB Charger Cable. Note: 1.Before you start using the headset, please use the USB charge cable to charge it first. 2.Pairing, press the power button of the headset, you will see the blue-red light blinking, it will automatically enter pairing mode. 3.Make sure you turned on the bluetooth on your phone, search headset model on it. The headset support the laptop which with built-in bluetooth adapter or inserted in a third party bluetooth adapter. 4.Select the Bluetooth model and click connect. Enter the password or code 0000 if needed.