WH850i ANC Active Noise Reduction Over-Ear Bluetooth Headphone Features: 1. ANC active noise reduction: The noise reduction depth is 25db, which can easily handle various environmental noises and give you a quiet world. 2. Game mode: 40ms ultra-low latency, closely synchronized audio and video, precise listening and positioning, fully immersing yourself in the game battlefield to help you win easily, and feel the thrill of man-machine integration. 3. Wired mode: Even when there is no power, you can use the AUX audio cable, which can be plugged into a computer and 3.5mm audio port. 4. Bluetooth 5.3 chip: Using Bluetooth 5.3 version, you can listen at will within a connection distance of 10 meters. 5. Super long battery life: built-in 400mAh lithium battery, up to 45 hours of use in Bluetooth mode, 35 hours of use in noise reduction mode, and 500 hours of standby time. 6. Lightweight head bow design, ergonomic design, comfortable fit, stable and will not fall off 7. The earmuffs are made of full-ear protein leather and zero-pressure memory foam, which are soft against the skin, light and breathable. 8. 40MM dynamic unit, strong performance, restores delicate audio details, thick bass, clear treble, can analyze every sound well, making the sound more vivid. Specifications: Bluetooth version: V5.3 Transmission range: about 10m Transmission frequency: 2.4G-2.48G Supported protocols: HFP1.7 HSP1.2 A2DP1.3 AVRCP1.6 SPP1.2 PBAP1.0 Standby time: 500H Talk time: 40H Bluetooth mode music time: 45H Noise reduction mode music time: 35H Charging time: 2H Headphone battery: 400mAh Speaker: 40mm 32ohm PET diaphragm Speaker frequency: 20Hz-20KHz Delay after game mode is turned on: 50ms (+-10ms) Signal-to-noise ratio: 95db Product weight: about 426g