Description
The Sherlotronics S4 (TX 4 Channel 1.5KM) is a robust 4-channel, 12V DC standalone wireless transmitter designed for long-range, secure remote control up to 1.5km (open air). It uses code-hopping encryption on 403MHz or 433MHz frequencies, providing secure, supervised communication for alarms, electric fences, gate motors, and industrial equipment control.
