M21 TWS Wireless Headphones Couple Noise Canceling Bluetooth Earphones 9D Stereo Sports Waterproof Four Earbuds Headset With Mic

If the headset you received has only one earbud to use for the first time, then you can do as I said, delete the bluetooth name in the phone, take all the earbuds out of the charging box, and then pair it again

The earbuds of this product are protected by transparent tape at the charging place of the charging compartment, please tear off the transparent tape as soon as possible after receiving the product and pair

Note:

M21 can be used with one ear and two ears, not all earbuds on a single device.

Link to manual

//www.315.org.cn/fw/asyt/index.asp?id=19630908373429553246

Product Description

Product Name ： M21 Tws Earbuds

Material ： PC+ABS

Package ： Gift box

Working distance ： About 10m

Charging input voltage ： 5V

Charging case capacity ：2000mA

Charging Time ：1~2 hours

Standby time ： About 120H

Talking Time ： 3-4 hours (1 time full charged )

Music time ：3-4 hours (1 time full charged )

Founction ： Waterproof, Noise Cancelling, Microphone, Music play/pause, connect/hang phone, reject call, up and down song switching, binaural HD call.

Waterproof ：Waterproof for Life care ( Sweatproof,rainproof,splashproof .Can’t use for diving,shower etc. )

Connection method ：single/double free to use

Package Included:

2 pairs * wireless earbuds (left and right)

1 * charging box

1 * Charging cable

1 * QR code （User Manual）

1 * Paper box