Fetures: Very light: single ear is only 3.5g, 108-degree elevation design, internal silicone earplugs, flying comfort. Ear-hanging design: Ergonomics, anti-dropping ear-hanging type, according to the shape of human auricle, the stress points of ears are dispersed, so that the ears are stressed evenly, and the headphones will not fall off during intense exercise. Super standby: 20-hour battery life, charging once, can be used for one week. Deep noise reduction: Intelligent noise reduction for high-definition calls and voice reduction technology for intelligent voice calls greatly optimize the clarity of sound. HD surround sound quality: professional sound quality, 13mm high-quality moving coil unit, with large composite diaphragm moving coil, brings lossless HF sound quality; The mid-low frequency dive is surging, and the high frequency is bright and transparent, creating an aural feast with its own version. Compound diaphragm woofer, full and vigorous bass; Metal diaphragm high-frequency horn, the treble is exquisite and not harsh. Low latency: Bluetooth 5.1 upgraded version tends to low latency, bid farewell to audio delays such as games and dramas, enjoy wireless freedom, and transmit quickly at 10M distance; Better compatibility and more stable connection signal. One-button operation: intelligent control, one button earphone can realize music, conversation, voice assistant, previous song, next song and other operations. IPX4 waterproof and sweat-proof: headphones support IPX4 waterproof splash, sweat splash is not afraid, exercise headphones. Specifications: Colors: Blue/Red/Green/Black(As your choice) Bluetooth version: 5.1+EDR Distance: 10 meters Talk time: about 5 hours Listening time: about 5 hours Headphone battery: 75MAH Wireless frequency: 2.4GHZ Support agreement: A2DP1.3/HFP1.6/HSP1.2/AVRCP1.6/D11.3 Transmission distance: 10 meters Charging voltage/current: 5V/1A Charging time: about 1.5 hours Standby time: 120 hours Microphone sensitivity: -42Db Working temperature: -10-50℃ Package Include: 1* Headphones 1* Data Line 1* Instructions 3* Silicone Earplugs HD surround sound quality Deep noise reduction,Super standby IPX4 waterproof and sweat-proof