1. Portable and foldable style with very smart and slim size.
2. Built-in 40mm mylar speaker.
3. Portable USB transmitter. Convenient connection to laptop and computer.
4. Built-in hight quality micphone for natural and clear sound on chat mode.
1. Frequency range: 2.4G-2.48GHz. 2. Modulation / demodulator way: GFSK. 3. Transmitting power: 0 dBm. 4. Frequency reponse: 20Hz-15Hz. 5. Separation > 70dB. 6. Distortion: 1%. 7. S/N ratio: > 70dB. 8. Power: built-in chargeable 150mAh lithium battery. 9. Working: 5 hours.