Function: 1. Bluetooth 5.0 and excellent sound, the latest Bluetooth 5.0 ensures an uninterrupted connection (33ft/10m wireless range). Compatible with most Bluetooth-enabled devices, e.g. The 40 mm large aperture drive delivers Hi-Fi sound and powerful bass. 2. Shape-memory sponge ear cups completely cover the ears and reduce pressure for maximum komfort. 3. 4. Active noise cancelling headphones use advanced technology, block ambient noise, even on busy street/office/bus/train/car, can immerse yourself in the world of music, noise cancellation function works well in wireless mode. 5. stereo foldable headset with noise reduction and strong bass, the ability to connect a memory card with a microphone, a sports Bluetooth headset. Specification: Item Type: Wireless Bluetooth Headset Material: ABS Drive: approx. 40 mm / 1.57 inch Impedance: 32 OHM Bluetooth version: Bluetooth v5.0 Bluetooth using frequency range: 2,4 GHz Power Level: Class II Bluetooth distance: 10M barrier-free Frequency Response: 20-20000 Hz Equipped with high quality stereo A2DP/AVRCP audio transmission and remote control protocol Charging time: about 2 hours Connection time: about 8-10 hours Music time: about 8-10 hours Standby time: about 120 hours Battery capacity: 250MAH (Lithium Polymer Battery) Charging Power Supply: DC5V Power Supply Weight: approx. 405g List of packages: 1 x Headset 1 x USB charging cable 1 x AUX audio cable 1 x Manual