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Bluetooth version: 4.1 Bluetooth calls: full-duplex Wireless distance:Accessible 10 meters and above Frequency range: 2.402GHZ Talk time: 5-6 hours Standby time: 350 hours Receiving sensitivity < -80dBm Rechargeable battery: 130 mah Charging voltage: 5V 0.7A Compatible with a variety of Bluetooth devices, including low-end high-end mobile phones, IPAD, notebook computers, speakers, bracelets, watches, etc. Quick boot code: pairing for the first time connection to Long press the middle button for 2 seconds, the sound drops, the red light and the blue light turn on in turn, then the red light and blue light alternately flash into the code pattern; the code is successful, the blue light is on and the phone can turn on the bluetooth to search for the bluetooth name. Package Contents: 1 Bluetooth hat 1 USB data cable 1 user manual