Product features: 1. Connected with landline home or office phone 2. Connected with PC, DVD, MP3/MP4 etc equipment with 3.5Audio Jack, Pairing withBluetooth Stereo Headset for listen music. 3. Secure connectivity with Bluetooth frequency-hopping and 128-bit digital encryption 4. Four default PINs (0000, 1234, 6666, and 8888) facilitating device pairing 5. User-defined PINs through a 7-segment LED display 6. Storage of access codes, up to 8 devicesTechnical specifications: 1. Standard: Bluetooth 2.0+EDR 2. Supported profiles: Audio Gateway in Headset and Handsfree Profile 3. Frequency:2.4 2.4835 GHz (ISM band) 4. Tx power: Max. 18dBm (Class 1) 5. Rx Sensitivity:-86dBm typical 6. Antenna: PCB antenna 7. Working distance: Up to 100m (can work on different Room) 8. Phone jack: Two RJ-11 ports (one for line in; the other for extension) 9. Regulator: Internal 1.8 V regulator 10. Operation temperature:-20 to +50 Centigrade Degrees 11. LED indicators: Red LED (showing the status of pairing, power, connection, or stand by) 7-segment LED (showing PINs)