Main Features‎:‎Highly Flexible Headband‎:‎ Made of high toughness PC material with soft PU leather cover‎,‎ the headband is foldable and flexible‎.‎Soft Earpads‎:‎ On ear design with soft memory sponge fillings ensure long time wearing comfort‎.‎Ultra‎-long Standby‎:‎ Up to 1100 hours long standby‎,‎ can listen music or talk for 25 hours continuously‎.‎Hi‎-Fi 24bit HD Sound Decoding chip‎:‎ Built‎-in 24bit HD chip‎,‎ brings you real Hi‎-Fi surround sound‎.‎Bluetooth 4.1 chip‎:‎ Adopts latest Bluetooth chip‎,‎ transmitting data at high speed and bring you smooth music experience‎.‎ And its low power ensures long lasting battery life‎,‎ which can be up to 5 hour continuous music time‎.‎ Also it works well with most smartphones for iPhone / HTC / Motorola / LG / Samsung Simple and stylish‎:‎ The design is quite simple and stylish‎.‎ 2 colors for your choice‎:‎ Black and white for your choice‎.‎ The white one have colorful geometric figures and black one have white random letter for decoration‎.‎ Show your own style‎.‎Clear calls‎:‎ Adopts acoustic echo cancellation for calls‎,‎ a technology which can help to cancel echo and bring you clear calls‎.‎ Also‎,‎ you will never miss a call when you‎'‎re enjoying music‎.‎Support Line‎-in Music‎:‎ Play music from MP3 player‎,‎ smartphone or other audio devices via double‎-head 3.5mm aux‎-in cable‎.‎ Brand‎:‎ Bluedio Model‎:‎ A Color‎:‎ Black‎,‎White Wearing type ‎:‎ Headband Function‎:‎ Bluetooth‎,‎Microphone‎,‎Voice control‎,‎Answering Phone‎,‎Song Switching‎,‎Noise Cancelling‎,‎HiFi Headset type‎:‎ Dynamic Connectivity ‎:‎ Wireless Connecting interface ‎:‎ Micro USB Application‎:‎ Mobile phone‎,‎Computer‎,‎Portable Media Player Driver unit‎:‎ 57mm Frequency response‎:‎ 15Hz~25KHz Impedance‎:‎ 32ohms Sensitivity‎:‎ 110dB Talk time‎:‎ 25 hours Music Time‎:‎ 25 hours Standby time‎:‎ 1100 hours Bluetooth‎:‎ Yes Bluetooth version‎:‎ V4.1 Bluetooth distance‎:‎ W/O obstacles 10m Bluetooth band‎:‎ 2.4GHz ‎- 2.48GHz Bluetooth protocol‎:‎ A2DP‎,‎HSP‎,‎HFP Package weight‎:‎ 1.423 kg Product size ‎(‎L x W x H‎)‎‎:‎ 19.20 x 17.20 x 7.50 cm / 7.56 x 6.77 x 2.95 inches Package size ‎(‎L x W x H‎)‎‎:‎ 24.00 x 23.00 x 11.00 cm / 9.45 x 9.06 x 4.33 inches Package Contents‎:‎ 1 x Bluetooth Headset‎,‎ 1 x Audio Cable‎,‎ 1 x USB Charging Cable‎,‎ 1 x Engslish User Manual