Parameter: 1. Standard frequency of double audio frequency: Low frequency group 697, 770, 852, 941Hz; High frequency group1209, 1336, 1477, 1633Hz; Frequency deflection: <1.5%. 2. Electronic lever: Low frequency group--9dbm 3dbm, high frequency, group--701dbm, 3dbm. 3. Time delay to arm: 0~99 seconds (you can set by yourself) 4. Siren hooting time: 1~30 minutes (set by yourself), more than 30 minutes the siren will hoot all the time. 5. Standby current: <25mA DC 9V 6. Working current: <200mA 7. Environmental condition: -10 ~ 45 degree, humidity: Less than95% 8. Power supply: 9V, 300mA. Description: 1) Compact design, Orange backlight, big LCD Screen Display. 2) Illegally arm/disarm function(optional); 3) Can dial via neighbor's phone when phone line is cut off; 4) Low power indication function; 5) 40 zones LCD display with 32 wireless zones and 8 wired zones; 6) program 3 groups of time to timely arm or disarm the alarm system; 7) Voice Instruction; 8) Arm/disarm each zone separately 9) compatible with the international Digital Communication Standard- Ademco protocol such as CONTACT ID