Headset Wireless Bluetooth Headset Metal Telescopic New Large Earmuff Bluetooth Headset Features: Bluetooth wireless and wired dual-purpose design: The headset has 3.5MM audio port and card- socket, which can meet your needs adjustment of telescopic head beam: the telescopic arm is used to - adjust the size of the headphone head beam, most of which can be worn comfortably Skin-friendly ear stickers are accompanied by softness: ear muffs are made of skin-friendly leather and vegetable soft sponge, which are breathable and not stuffy, providing comfortable wearing enjoyment No delay picture synchronization in the game: the connection is stable and continuous. -, listen to the voice, distinguish the position, high-definition video,-low delay picture synchronization 40MM super speaker: high resolution to - the details of every sound, HIFI - adjusted by - . Like live concert, you can enjoy the exciting immersive and give you new experience - your- Product Description: Product parameters: New of Bluetooth: V5.3 Charging time: about hours playback time: about 15 hours ( to volume and song) Talk time: about 15 hours (depending the volume) Battery specification: 3.7V/400mAh lithium battery with double protective plates Effective stable connection distance: ≥ 20m Support external card- ( card) Support radio function foldable structure, metal telescopic tab Input voltage/current: 5V/1A Horn: diameter φ 40MM，32 Ω, Audio output power: 22mw * Microphone: sensitivity - 42dB ± 3 Product packaging size (CM): 18.3 * 9.3 * 14.5 Package weight (g): 350 Package: 1 * Headphones 1 * Charging cable 1 * Audio cable 1 * Instructions 1 * Packing box