Single Ear 4.2 Bluetooth Headset Stereo HIFI Sports Wireless Bluetooth Headset 1. Bluetooth version: 4.2 2. Operating range: about 10m 3. Battery capacity: 300mAh 4. Talk time: about 30H 5. Music time: about 12H 6. Function: intelligent noise reduction, music pauseplay, intelligent number reporting 7. Size: about 51x13x8mm 8. Weight: about 8.1 grams Features: 1. Long standby time, easy to use 2. Panoramic sound effect, enhance the sense of space of sound, surround sound effect 3. One-key operation, simple and convenient, playpause, power onoff, answerhang up 4. IPX3 waterproof and sweatproof, fast connection, stable and not easy to disconnect 5. Titanium-plated composite diaphragm, rich bass and delicate treble 6. Using DSP digital model to process noise reduction, effectively reduce wind noise and ambient background noise 7. Lightweight and portable, comfortable to wear, stable and not easy to fall off