describe:1. Bluetooth V5.0: Purer wireless audio transmission is achieved through Bluetooth V5.0. Intelligent control makes technology an integral part of modern life. Compatible with most Bluetooth devices, such as mobile phones/PCs/laptops/tablets/MP3/TVs.2. Excellent sound quality 40mm dynamic unit, explosive bass, such as: B. Clear and lifelike sound quality and thick bass in the scene, giving you a different listening experience.3.10-12 hours battery life and charging speed: Bluetooth headphones provide 10-12 hours of excellent sound quality on a single charge. Up to 10 hours of talk time and up to 300 hours of standby time (we've increased the battery capacity from 200mAh to 400mAh).4. Always comfortable: Roomy, soft earcups provide an excellent fit, ensuring a high level of comfort even during longer wearing sessions. Sealed earmuff design effectively blocks external noise. Foldable appearance, adjustable head size, high applicability.5. Three-in-one multi-function: When you purchase headphones, you can enjoy 3 different playback modes (wireless/wired/TF card mode) to meet your daily diverse needs. Wear the earcups for music and call control comfort.Product parameters.Product name: Bluetooth headsetWearing method: head-mountedProduct weight: about 199gFunctional use: wireless earphones, voice earphonesBluetooth mode support: A2DP 1.2, AVRCP 1.0, HSP, HSF 1.5Frequency: 2.402-2.480GHz, 2.4g ISM frequency bandRF performance: Receive sensitivity: -84DBM; transmit power less than or equal to 4 dBmFrequency response: 20 Hz-20 kHzSignal-to-noise ratio (SNR): 70 dB;Total harmonic distortion (THD) 0.1%Power indicator light: blue lightHeadphone charging: 400mAh rechargeable lithium batteryCharging Port: Mini 5-pin USB charging portNormal charging time: about 3 hoursTalk time: up to 10 hoursMusic time: up to 6 songs - 8 hoursStandby time: up to 250 hoursWorking temperature: -20 -55Other functions: Support status indicator light, charging indicator lightColour: BlackMaterial: metal + ABS gold platingDimensions: 14.5x7.5x20.2 cmPackage Contents:1x Bluetooth headset1x USB charging cable