This is a fashion, comfortable and durable design noise cancellation Bluetooth headphone with built-in rechargeable lithium battery. It is for both wireless and wired use. This headphone with built in Bluetooth + Noise Cancellation functions allows you to enjoy music freely and receive calls wirelessly, and enjoy high-definition stereo sound quality. You can listen to music, answer the phone, hang up the phone, and make calls and so on. This headphone can inter-charge between Bluetooth and cords control functions automatically.Main Parameters:1. Noise reduction: 10DB-15DB2. Bluetooth: 2.4GHZ3. Receiving Range: 10-40 meters without obstacle4. 40MM HiFi loudspeaker5. Frequency range: 20-20,000Hz6. Working voltage: 3.6V7. With microphone function, microphone sensitivity: 45 DB8. Charging method: 2.5 DC charging plug9. Plug: 3.5 mm stereoscopic plug10. Installed rechargeable lithium battery: 33*23.7*6.8mm (400Mah)11. Standby time: 180 hours, continuous working 8 hours12. Color: Black & RedFeatures:1. Wireless function (Bluetooth). Bring convenience to the life and work2. High definition function: 2.4 GHZ Bluetooth3. Receiving range: 10-40M4. 40MM, for example: music 100% close to sound with cable5. Adopt most advanced noise reduction function isolate all outer noise, let you feel joy of music6. Adopt dynamic circle speakers, no matter listen tenderness music or mental music makes your feeling into the music scene7. Adopt high definition voice calls (microphone) function, enjoy work and leisure8. Adopt rechargeable lithium battery, which is environment friendly, straight plug. Standby time 180hours, continuous working 8 hours9. Stylish & fashion design. Portable & foldable design10. Brand new in original packageUsages:1. This Syllable G15 wireless headphone connect to Blackberry, HTC, Nokia, Samsung, LG, Motorola, iPod, iPhone, iPad, Sony Ericsson, or any other device that has Bluetooth capability.2. Very good choice for listening music, watching movie, chatting online etc. It is also convenient for make calls.Package Included:1 x Headphone (original package)1 x USB Charging Cable1 x 3.5mm Audio Cable for Physical Connection1 x 2 Pin Aircraft converting plug1 x Cleaning Cloth1 x Carrying Bag1 x Instruction Manual1 x Warranty Card