Single BT Earbud, Cordless BT 5.2 Earpiece, Comfortable Wear BT Headset with Digital Display, Rotatable Clear Sound Single Cordless BT Earphone for Smartphones (V13 Black) Convenient Use: The Cordless BT earpiece connects to two BT devices simultaneously, switch between music and calls, convenient for daily use. Flexible Rotation: The Cordless in ear earphone features built in adjustable rotating axis for easy 270 degree rotation, customizable comfort angle for personalized wear. Clear Sound Quality: The Cordless earphone is equipped with premium diaphragm speaker unit, balanced tuning technology, and meticulous calibration for clear sound layers and rich details. 1. Comfortable Wear: The Cordless BT earphone features ergonomic design that fits ear canal, comfortable to wear for long periods, stays in place during intense activities. 2. Clear Sound Quality: The Cordless earphone is equipped with premium diaphragm speaker unit, balanced tuning technology, and meticulous calibration for clear sound layers and rich details. 3. Stable Connection: The single headphone features BT 5.2, intelligent low power chip, seamless 10m Cordless connection, smoother gaming with no latency. 4. Convenient Use: The Cordless BT earpiece connects to two BT devices simultaneously, switch between music and calls, convenient for daily use. 5. Flexible Rotation: The Cordless in ear earphone features built in adjustable rotating axis for easy 270 degree rotation, customizable comfort angle for personalized wear. Specification: Item Type: Single BT Earbud Material: ABS BT Version: 5.2 Battery: Built in Polymer 300mAh How to Use: Refer to the instruction manual for detailed instructions. PackageList: 1 x BT Earphone 1 x Charging Cable 1 x User Manual 2 x Ear