Z28 Wireless Ear Clip Type Single-Ear Bluetooth 5.3 Earphone 1. Bluetooth solution: Jelly 6983 2. Speaker: 10MM copper ring speaker 3. Battery capacity: 50mAh 4. Charging port: Micro USB 5. Input: 5V 1A 6. Standby time: about 800H 7. Working time: about 7H 8. Charging time: about 1H 9. Bluetooth version: 5.3 10. Communication distance: about 10-15m without obstacles 11. Weight: about 7g Features: 1. Clip ear design, comfortable to wear, no need to enter the ear, not picky ear shape, not easy to fall 2. Composite diaphragm speaker unit, balanced adjustment technology and fine-tuning, layered and more detailed 3. Power on memory back to connect, quickly connect the device 4. Highly elastic skin-friendly material, adjustable and stretchable, light and comfortable 5. Using Bluetooth 5.3 chip, music calls zero delay, low power consumption more power saving, more stable calls, clearer sound 6. Adaptive directional sound transmission, detecting the shape of the ear canal, automatically adjusting the propagation angle of the integrated sound beam to ensure efficient transmission of sound into the ear canal 7. Intelligent noise reduction, clearer voice calls 8. Support with a variety of devices with Bluetooth function, cell phones tablets laptops and other use