Description: Single Bluetooth : , compact and lightweight size, comfortable to wear, on the ear, easily put into your . Digital Dis: 1-9 digital dis screen, smaller size, dis 9 when fully charged. and convenient, easy to observe, understanding of the the . Easy to Operate: controls all feature, back, song, /pause, calls, stereo sound effects an audio . Support voice assistant function. Bluetooth 5.3: Bluetooth 5.3 provides stable , lower latency, paring and universal compatibility. And buying 2 true function. Long Standby: in 100mAh capacity baterry, the standby time is about 220 hours, 10 hours long time, It takes about 2h to charge the . IPX5 Waterproof, suitable for business, office and . Specification: Product size: 2.5cmx1.3cm/0.98x0.51inch Material: plastic Pairing name: M5 Bluetooth version: V5.3 Battery capacity: 100mah Frequency: 20Hz-20KHz Impedance: 32 ohms Sensitivity: 85dB/mW Waterproof grade: IPX 5 Includes: 1 Piece 1 Piece Charging Cable 1 Piece 1 Piece Manual Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful shopping!