Product Description 

 KTT9 the disaster area Tel applicable in the mine tunnel, disaster areas, underground air defense facilities, underground shopping malls, warehouses, caves, tunnels, remote mountainous areas, the electromagnetic waves can not transmit the regional establishments and other places. 

 KTT9 disaster area phone performance characteristics 

 Operating Temperature: -20 ° C - +40 ° C Distortion: ≤ 10% Operating frequency: 300HZ - 3000HZ 
 Alarm Frequency: 1000HZ - +-200HZ security parameters: Operating voltage: 12V 
 Operating Current: ≤ 50 open is pressed: 14v, short-circuit current: ≤ 450mA 
 Power communication box: voltage DC12V capacity: 1100MAH life: rechargeable continuous use time:> 16 hours