Description: 5.2: 10 meters connection is stable. High compatibility, as long as mobile phones, , computers and other devices have function, they can almost be paired and used. 360° surround sound: 10MM titanium-coated diaphragm. The built-in high-sensitivity microphone enables binaural high-definition calls, efficiently recognizes human voices, and intelligently reduces noise. Comfortable to wear: Made of silicone material, ergonomic structure, the curved surface fits naturally, and it is not painful to wear for a long time. The triangle is stable, and the movement is not easy to fall. Automatic pairing: The earphones are automatically paired when they are taken out of the battery compartment, whether single pair or left and right earphones can be paired automatically. Small size, portable and easy to carry. Long-lasting battery life: The headset can listen to songs continuously for about 7 hours at a time, the charging time is about 1.5 hours, and the battery life is 24 hours. Intelligent power display, control the power at any time. Specification: protocol: 5.2 Transmission distance: ≥10 meters Frequency range: 20HZ-20KHZ Speaker size: 10.6MM Headphone battery: 300mAh/3.7 Playing time: about 7 hours Charging time: about 1.5h  Product weight: about 27g Material: Silicone Size Chart: 65x45x22mm Package Includes: 2 x Headset 1 x Charging Case 1 x Charging Cable 1 x 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!