... M4:Momentary-signal non-locking , L4:Latch-signal interlocking,T4:Toggle-signal self-lockingEncoding chip: program chip , It can use ... , lifting equipment, gateways, industrial control, security and protection field(wired to wireless switching system) ,it can support remote control , which ... time, we ensure that our wireless products and security and protection systems are of the highest standard to ...