Edifier's around-the-ear closed-back headphones are known for their comfort as well as their sound quality. With the W820BT experience all-day comfort with thanks to the foam padding on the ear cups that shape to the area around your ear. Experience high-quality lossless audio and a strong Bluetooth connection with Bluetooth v4.1 with added CSR technology. Listen for 80-hours straight with Edifier's headphones. If you prefer having using a traditional headphone cable, one is packaged in the box to let you switch between wireless and wired. Adjust the headband's tightness by bending out or bending in the headband. The W820BT has adjustable sides to fit the shape of your head to reach ideal comfort. Features: - Dual batteries setup - Playback time for up to 80 hours - Bluetooth V4.1 with CSR technology - Foldable design with flexible steel headband - Standard 3.5mm / AUX audio cable included - New generation 40mm NdFeB driver units Specifications: - Driver unit: 40mm NdFeB drivers - Bluetooth version: Bluetooth V5.0 - Supported Profiles: HFP, HSP, A2DP, AVRCP - Frequency response: 20Hz-20Hz - Working Time: 80 hours - Sound pressure level (SPL): 100dB - Nominal impedance: 32 Ohms - Weight: 0.26kg What's in the box

Headphones Micro USB cable 3,5mm audio Jack User manual