... alarm zone by real time through long-distance Specification:1. Wireless frequency: two option: 433MHz or 315MHz2. An adaptor: option: ... : >250m, indoor: 30~50m, (depend on the surrounding environment and wireless interference)4. Standby current: < 15mA5. Alarm volume: internal :95dB, ... one PIR detector, two remote controllers, one telephone line, one wired siren, one adaptor, one instruction