Description: Single Bluetooth Earbud: Mini invisible wireless earbud, compact and lightweight size, comfortable to wear, no burden on the ear, can be easily put into your pocket. Digital Display: 1-9 digital display screen, smaller size, display 9 when fully charged. Intuitive and convenient, easy to observe, real time understanding of the power of the earphone. Easy to Operate: One button controls all feature, playback, next song, , phone calls, etc. Hifi stereo sound effects bring an audio visual feast. Support voice assistant function. Bluetooth 5.3: Bluetooth 5.3 provides more stable connection, lower latency, faster paring and universal compatibility. And buying 2 earbuds can achieve true wireless function. Long Standby: Built in 100mAh capacity baterry, the standby time is about 220 hours, 10 hours long , It takes about 2h to charge the headset. IPX5 Waterproof, suitable for business, office . 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 Package Includes: 1 Piece Earbud 1 Piece Charging Cable 1 Piece Ear Caps 1 Piece Manual Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful online shopping!