Features: <> Active Noise Cancelling Technology: Enjoy superior sound quality with our headphones featuring ANC mode, transparency mode, and normal mode for a pleasant listening experience. <> Crystal Clear Hands-Free Calls: Stay connected with friends and family with our hands-free microphone that reduces background noise for clear and uninterrupted calls. <> Long-lasting : Enjoy to 45 hours of continuous playback thanks to the built-in 650mAh , perfect for long commutes, travel, or daily use. <> Portable and Foldable: Easily fold and store your headphones when not in use, making them convenient for on-the-go use and saving space in your bag or luggage. <> Superior Comfort and Durability: Designed for all-day wear, its comfortable ear cushions ensure a snug fit and long-lasting comfort. Use it whether you're working out, commuting, or relaxing at home. <> <> Specifications:<> Brand Name: KO-STAR<> Model Number: -1092 <> Version: 5.2 <> Transmitting Distance: 10m/33ft (no obstacle) <> Protocol: , HFP, A2DP, AVRCP <> Horn Diameter: 40mm <> Frequency : 20-20kHz <> Speaker Sensitivity: 105dB±3dB <> Mic Sensitivity: -42dB <> Impedance: 32Ω <> Headphone Noise Reduction Value: 30dB±3dB <> Capacity: 3.7V 650mAh <> Working : about 45 hours (normal mode); about 35 hours (ANC mode) <> Port: Type-C <> Material: ABS <> Color: gray, Black (Optional) <> Item Weight: Approx. 206g/7.26oz <> Package Size: Approx. 22.7*20.0*7.0cm/8.93*7.87*2.75in <> Package Weight: Approx. 710g/25.04oz <> <> Package List: V10873B <> 1 * Headset <> 1 * Cable <> 1 * Carrying Bag <> 1 * User Manual