IOUIOU Truly Wireless Earbuds with Charging Case Microphone Bluetooth 4.2 Stereo Noise Canceling Waterproof, Fit iPhone/Android Phones/Tablet/Laptop/PC Wireless Bluetooth Headphones Earbuds

product description:

How to use two simultaneously?
(You also can refer to video on https://youtu.be/hh_2bmBf_4Y)

Basic Operations:
1. Power on/ off
Press the button for about 3 seconds until LED turn blue/red.
2. Activate pairing mode
Power on and press the button twice quickly and can see LED flashes red and blue alternatively.

If you received the version with FOUR replacement ear tips, please follow the 2 steps below.
If you received the version with SIX replacement ear tips, please follow only step2.
1. Pair two to each other
Active pairing mode of two earbuds, wait for 10 seconds until both LED indicators turn off.
Power off anyone. (If LED keep flashing over 10 seconds, pls press each button twice quickly)
2. Connect to a device
Press the button of LEFT earbud for about 5 seconds until LED indicator flashes blue &red alternatively,
turn on Bluetooth on your device, search for "IO-20(L)" and click it to connect. Turn on the RIGHT. Dual ear mode is ready.

Warm tips:
1. Once two paired(step 1), they will automatically pair next time so you can skip step 1.
2. Under dual ear mode, turn off anyone, the other will also turn off.

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Parameter
Dimensions: 1.14*0.70*0.90in
Weight: 0.2ounces
BT protocol: HFP/HSP/AVRCP/A2DP
BT: 4.2
Transmission distance: 10M (33ft)
Noise cancellation: CVC8.0
Battery capability: 50mAh
Charging voltage: DC 5V
Standby time: 120h
Music time: 4h
Talking time: 3h
Charging time: 30min
Capability of charging case :400mAh
Charge time of case:2h

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