High Efficiency Best Price 16 Channels Wireless Interphones VT-7800 Specifications:1 .Frequency Range: 150-174, 400-420,430-450,440-480MHz. 2. Output power: 1W/5W 3. Channel: 16 4. Busy channel lockout 5. VOX function 6. CTCSS/ DCS 7. Time-out Timer 8. Wire clone 9. Low battery alert 10. Battery Save 11. Sounds report number 12. P.C programming 13. Talk Range:5 - 10km 14. Dimension: 11.4*5.7*3.3cm(exclude antenna)15. Weight:190g(include battery)Technical Specification:GENERAL High Equipment Best Price 16 Channels Wireless Interphones VT-7800