Features Fine Workmanship: 433M 4 channel rolling code relay board module with high sensitivity and less interference, can store up to 32 RC43A04 remote controls. Professional Manufacturing: The maximum remote control distance of the relay module is 30‑50 meters, which is suitable for more remote control situations. Working Mode: The relay module transmitter kit with non locking (instant failure), self locking (Toggle), interlocking (Latch) and delay working mode, the delay time can be 5s, 10s, 120s. Reliable Performance: The wireless relay remote can pass through wall, floors and doors, and can control the receiver anywhere within a reliable distance. Wide Applications: The relay module transmitter kit is widely used in home lighting, industrial control and security fields, such as lights, motors, remote controls, wireless access alarms, etc. Specification: Item Type: Relay Module Transmitter Kit Model: RF33A04+RC43A04 Material: ABS, PCB Relay Board Module Parameter:  Working Voltage: DC 12V Working Current: Standby current (all relays closed) 14MA, 1 relay open 42MA, 2 relays open 69MA, 3 relays open 96MA, 4 relays open 122MA Wireless Receiving Frequency: 433.92M Wireless Receiving Sensitivity: -108dBm Decoding Method: Rolling code, only suitable for RC43A04 remote control, can store up to 32 RC43A04 remote control Working Mode: Non locking (instant failure), self locking (Toggle), interlocking (Latch), delay; delay time can be 5s, 10s, 120s Maximum Remote Control Distance: Approx. 30-50 meter / 98.4-164ft Relay Maximum Load (recommended <5A): 10A/250VAC, 10A/125VAC, 10A/30VDC, 10A/28VDC, 10A/12VDC Remote Control Transmitter Parameter:  Power Supply: 12V 27A alkaline battery (battery not included) Working Current: ≤9mA Oscillation Method: SAW resonator Modulation Method: ASK Operating Frequency: 433.92MHz Frequency Deviation: ±150Hz (Maximum) Coding Format: Rolling Code (HCS301) Typical Applications: Remote control, telemetry system, DC12V home lighting system, garage door, elevator, motor reverse control, remote control switch, smart home, home automation, LED light, security remote keyless entry system Package List: 1 x Relay Board Module 1 x Remote Control Transmitter  Package List 1 x Relay Board Module 1 x Remote Control Transmitter