Headset Wireless Bluetooth Headset Metal Telescopic New Large Earmuff Bluetooth Headset Features: Bluetooth wireless and wired dual-purpose design: The headset has a 3.5MM audio port and a card- socket, which can meet your needs Free adjustment of telescopic head beam: the telescopic arm design 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 memory 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, ultra-low delay picture synchronization 40MM super speaker: high resolution to - the details of every sound, HIFI level -band adjusted by - . Like a live concert, you can enjoy the exciting immersive music and give you a new experience - your- Product Description: Product parameters: New version of Bluetooth: V5.3 Charging time: about 2 hours Music playback time: about 15 hours ( to volume and song) Talk time: about 15 hours (depending on the volume) Battery specification: 3.7V/400mAh Class A lithium battery with double protective plates Effective stable connection distance: 20m Support external card- ( card) Support FM radio function Durable foldable structure, metal telescopic tab Input voltage/current: 5V/1A Horn: diameter 40MM32 , Audio output power: 22mw * 2 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