Model:Host-001 Name:Alarm Host Systerm alarm system on spot Two-in-one design for flash siren and main panel, alarm sound and flare both take action to make more powerful warning on spot. Can work with wireless 20 detectors. Alarm sound: 120Db Easy to operate, arm/disarm/help function Frequency: 315/433 MHZ Cheapest price in alarm system. Size:12x7.2x4.5cm Kits: Door Gap Detector (1 PC)+ Remote Controller (1 PC) + Flashing Siren (1 PC) + Power Supply (1 PC)