M518P Running Sports Long Standby Semi-In-Ear Neck-Hanging Digital Bluetooth Earphone 1. Using DVC digital noise reduction technology, intelligent noise filtering, clear and lossless calls 2. Magnetic fit design, earphone close to the automatic adsorption, solid fit, no shaking and no entanglement 3. With LED digital display, real-time monitoring of the earphone battery level 4. Smooth skin-friendly silicone material, unique memory arc, automatic rebound to restore the original shape at any time to adjust the curvature, wear more comfortable and natural 5. Three-point anti-dislodgement design, comfortable to wear, no feeling, no falling off the messy dump 6. Built-in 800mAh safe lithium battery, using low-power micro-power technology, 3 hours fast full, provides a long life 7. Bluetooth 5.3 chip, simple and fast connection, signal stability 8. IPX5 waterproof, tight body design, effectively prevent sweat damage components Parameters: 1. Material: PC+ABS 2. Bluetooth version: 5.3 3. Bluetooth chip: JL AC7006F4 4. Playback mode: bluetoothcard (hidden pop-up type) 5. Charging port: Type-C with dust plug 6. Battery indicator: LCD display 100 for full charge 7. Speaker type: F14 copper ring composite membrane 8. Transmission distance: 15 meters without obstacles 9. Charging time: about 3 hours 10. Frequency range: 2.4-2.480GHz 11. Battery capacity: 800mAh 12. Weight: 55g