433MHz wireless digital communication 4 channels Wireless two-way intercommunication Up to 500m for the communication distance in open area Easy installation and operation Working Temperature:-10C ~ 50C Working Voltage: DC 5V Working Current:400mA Standby Current:30mA Working Humidity: ≤80% RH Wireless Distance: ~500m (Open Area) Working Frequency:433.92 MHz ± 250 kHz
