Сигнализации и ХАБы Dahua

FunctionIndicator Light4 indicators (communication, arm/disarm, fault, and alarm)Button15 buttons (0–9, *, #, arm, disarm, and home arm)Buzzer1 × built-in buzzerArm and DisarmPassword; IC cardRemote UpdateCloud updateLow Battery DetectionYesTamperYesMeasuring Range (Temperature)–15 °C to +65 °C (+5 °F to +149 °F) (indoor)Measuring Accuracy1 °C (33.8 °F)User Management32 usersWirelessCarrier Frequency868.0 MHz–868.6 MHzCommunication MechanismTwo-wayCommunication DistanceUp to 1,600 m (5,249.34 ft) in an open spaceEncryption ModeAES128Frequency HoppingYesGeneralPower Supply4 × AA batteriesBattery Life3 years (if the device is used to arm and disarm once a day)Power