Leaden Wireless Bluetooth MP3 Sunglasses Polarized Lenses Music Sunglasses V4.1 Stereo Handfree Headphone for iPhone Samsung Most Smartphone or PC (Black)

Bluetooth Version?Bluetooth 4.1 compatible
Transmit Distance?10M
Conversation Time?6H
Music Time?5H
Standby Time?150 Hours above
Charging Voltage?5V
DC Charging Time?About 2 hours
Bluetooth Protocol?Headset;Hands-free
Bluetooth Spec?V2.1/3.0/4.0+EDR;
Stereo Sound + CVC noise reduction.
Turn on/off :Long press the bluetooth pause button for 5 seconds until you hear a Dumpt sound of bluetooth power on ,the bluetooth indicator flashing light on, in bluetooth power on mode , as done as turn on , until the bluetooth indicator light off , then turn off .
Bluetooth Pairing : Long press the middle button for about 8-10 seconds until the red light alternate with the blue light ,this means the bluetooth is in the paring status . Turn on your cellphone bluetooth ,find "BT glasses" device and connect it . The pairing is successful when the 2 lights stop flashing .