Specification: Material: Plastic & Rubber Talk Time: Up to 4Hours Standby Time: Up to 250 Hrs Control Buttons: Play/ Pause, VOL , VO -, Call/ Receive Bluetooth version: 1.2/V2.1, wireless transmitter standard of class II Frequency coverage: 2.402~2.480GHz ISM band Noise Reduction Ear Plugs

Specification: Material: Plastic & Rubber Talk Time: Up to 4Hours Standby Time: Up to 250 Hrs Control Buttons: Play/ Pause, VOL , VO -, Call/ Receive Bluetooth version: 1.2/V2.1, wireless transmitter standard of class II Frequency coverage: 2.402~2.480GHz ISM band Noise Reduction Ear Plugs Dimension: About 14.5 x 13.5 cm USB Cable Length: About 45 cm/ 17.72'' Sensitivity: -80dbm Transmit range: up to 10m Transmit speed: 57~723Kbps Stereo compression ratio: 44.1/48kHz Channel: 79 channels of 1MHz, B/W Contact terms: Point-to-Point Support Format: MP3 WMA WAV Support System: Windows 98 / 2000 / XP / Vista Mini USB IN Built-in Li-ion Battery (charged via USB) Main Function: Bluetooth flexible headset for use with mobile phones or computersHow to use: Hold press power button about 5 seconds until red and blue light flash, the earbuds will show in bluetooth device list. Choose the earbuds, enter pair code "0000". Hold press next back buttom to adjust volume. Package include: 1 X Bluetooth Headset 1 X USB cable