Specifications 1. 10 channels for choice, to avoid disturbance and overhearing. 2. DTMF/FSK dual system, filtrate code number function. 3. There is an alarm when it's over communication distance. 4. Flash, redail, pause function. 5. Back light. 6. The handset has the function of 50 goups of incoming call covered 16 numbers display, 10 groups outgoing call covered 16 numbers display. 7. Prd-dail function. 8. Press any key to answer the call. 9. It's hang off the call automatically by get the handset back to the base. 10. 13 kinds of chord music for choose, the volume could adjustable. 11. The handset work without electronic power with the real time display. 12. The LCD light could adjustable.