This system is a pocket-sized, wire free system and works off of your school’s existing internet signal. Each staff member will carry a very small pocket sized radio which can be attached at the waist with a belt clip. Each radio has a panic alert button which can be easily triggered in the event of an emergency or an attack. The alarm will immediately be heard by all other staff members that are carrying a radio linked to the system. The staff member (victim) then has 20 seconds to alert the other radio carriers to the room number he/she is currently in. This panic alert system is a must-have for any ASD unit. Price includes installation. Price is for minimum of 4 radios.