Active noise reduction chip signal-to-noise ratio: 75db. Through active noise reduction chip processing, it can effectively remove noise and retain the sound to present you with high fidelity sound quality effect Turn on Bluetooth automatic connection. Pairing is required for the first time, and then turn on Bluetooth to automatically pair the connection The Bluetooth 50 connection is more stable. With the newly upgraded Bluetooth 50 chip connection, the use signal is more stable, effectively reducing jamming and faster transmission Running with you can't shake off the ergonomic design, don't pick your ears, don't hurt your ears, and don't fall off when running with you It's painless to wear, HD noise reduction call Call / Music: 4-6h Battery capacity: 140mAh Waterproof level: ipx5 Signal to noise ratio: 75db Bluetooth: Bluetooth 5.0 Colour:Red Material:ABS Size:10 x 6 x 3CM Package Contents: 1 * earphone 1 * charging cable Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.