• Receiver: 01. Registred number can not be register again, avoid repeated registration to the same number
• 02. Display 3 groups of double-digit number at the same time 03. Prompt modes: Dingdong, Alarming sound, voice report
• 04. Call button capability: 199 05. English letter beginning display: A,B,C,D,E,F,H,P,L,J
• Call button: 01. Built-in silicone pad, 360 degree waterproof handling. 02. Small, thin, no screw, replace the battery easily
• 03. Anti-temperature and humidity changes. Strong EMC anti-interference