... alarm button, fire alarm system) Wireless Manual Call Point (manual alarm button, fire alarm system)1. Operated with single 12V DC battery2. Wireless network ... , no wiring is required and easy to install3. Working frequency: 315MHz / 433.92MHz4. Press button with moderate force5 ... Control panel VST-HS20087. CE approved,UL217Stand,BV ISO9001:2000 Wireless Manual Call Point