Specification: 
 Stand-by Time: 45days 
 BT on+ANC On: about 17h 
 BT on+ANC Off: about 25h 
 Talk Time: about 26h 
 Wireless Range: 33ft (10m) 
 Drivers: 20mW*2 
 Built-in Battery: 500 mAH 
 Charge Time: 2 hours 
 3.5mm Audio Input: Support 
 Item Weight: 227g
 
Never Power Off Headphones: 1. Wireless mode: The Bluetooth Headphones offers built-in rechargable battery (500 mAH) that is rated to last up to 17 hours with ANC, about 25 hours without ANC and 26 hours of talking time. 2. Wired mode: A standard-sized 3.5mm plug are included. plug in the jack when use it as a wired headphone. No battery charge needed in wired mode.
 
Active Noise Cancelling Headphones: Immerse yourself in calm and comfort with the wireless active noise cancelling headphones, for travel, work and anywhere, makes you focus on what you pay attention to, enjoy music, movies and videos.
 
Pairs Quickly: Wireless headset automatically connects to you bluetooth device every time after the initial set up, also can accept a wired connection. On a full charge, no static, dropouts, or interference in the strong Bluetooth connection.
 
Premium Sound: The high-fidelity stereo sound benefits from the 45mm large-aperture drivers, CSR chip, and the around-ear cushion design which provide a well-closed and immersed environment. Give an immersive listening experience, enjoy your music and voice.
 
Fold Up Space-Saving: Bluetooth headphones over ear can be folded into a compact size and stored in the carrying bag (included), great for travel or storage.