Features: Hammo Go is a noise cancelling over-ear headphone. It is developed to sound high definition, be more comfortable and stylish looking. Thanks to the exclusive SCCB technology and Votrik speaker, Hammo Go performs so professional and balance. Put it on, it is so quiet that every detail sounds clearer. No matter how noisy the world is, it"s just you and your music. Hammo GO is created for the people who have high demands on sound quality of their music, and leading stylish lifestyles. It comes with higher-quality materials and finishes. Declare your style by your favor color. Hammo GO has adopted the much-loved foldable design of Hammo, which reduces the volume by half once folded, which will fit easily into your luggage. Hammo GO also comes with a free drawstring carry bag, which is not only for your convenience in storing your headphones, but also for the protection of the headphones. Specifications: Application Type: Over-ear Performance: High definition Driver type: Dynamic Driver: 50mm Frequency response: 5~30KHZ Sensitivity at 1 KHz 1mW: 108dB Input impedance: 32Ω Max power: 100mW; Plug type: 3.5mm Cable-microphone: Yes; Plug-in audio cable: Yes Audio cable length: 1.2M Positive noise cancellation: noise cancellation on/off dual modes Battery: replaceable AAA battery Power standby: 3 months Music playing time: 15 hours(with all new batteries) Weight: 270g; Product dimension(L x W x H): 195x185x74mm Packing List: Headhpone*1; Audio cable*1; Storage box*1; Instruction manual*1; AAA battery * 2