MARSEE msh03 Active Noise-Cancelling Bluetooth Headphones Over-The-Ear Wireless Headphones with CSR 4.0 Built-in Mic and 12 Hour Battery Active noise cancellation: Design with a noise cancellation switch, flip switch on these truly active noise cancelling headphones Premium 40mm stereo drivers: enjoy thumping bass, prominent midst & sparkling highs with this premium Bluetooth headset's 20hz-20khz frequency range Advanced Bluetooth 4.0: industry-leading CSR Bluetooth 4.0 supports A2DP, AVRCP, HFP and HSP for a fully wireless experience 12-hour rechargeable battery: Charge your wireless headphones for 2-3 hours & enjoy up to 12 hours of playtime (18 hours talk time) High compatibility: The best Bluetooth headphones anywhere near this price range