Features 1.Bluetooth version: V4.1 2.Working range: up to 10 meters on open air 3. Frequency response: 20-20000Hz 4.Playing time: 4 hours 5.Stand-by time: 100 hours Charging Time: about 1 hour Reception level of sensitivity: Operating voltage range: 3.0V-4.2V Compatible with Apple iPhone 6/6S/7, ipad, notebook, Samsung Android, etc. USAGE 1.First time connection, short press the power button until the led flash in blue and red alternately, then turn on your smartphone to search available device( HBQ-i7), then you could listen to music and make calles. 2.Charging: Fully charged the battery in 80 minutes.power indicator charging: red light; full power: red light off ,blue light on. Note Only one unit for this earbud. One Bluetooth device can only pair one earbud, it can't pair two earbud at same time.
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