It's a AC 110V 220V 250V 12 CH Remote Control Lighting Switch 12 channel 10A Relay 220V Receiver Industrial level 12 button Transmitter.
Specification 
- Model: AK-12F
 
- Operation Voltage: DC12V
 
- Operation Current: ≤35mA
 
- Operation frequency: 315/144MHz(optional)
 
- Transmission power: >30mW
 
- Transmission distance: 1000m(in empty environment)
 
- Frequency deviation: ±0.2MHz
 
- Transmission rate: 3-6K
 
- Encoding chip: PT2262/EV1527/HCS301
 
- Size: 97*50*14.7mm
 
- Weight: 0.26kg
 
Controller:
- Working voltage: AC220V
 
- Working temperature: -40°C ~+80°C
 
- Receive sensitivity: ≥-105dBm
 
- Operating frequency: 315/433MHz (optional)
 
- Output Current: ≤3A
 
- Weight: 0.55KG
 
- Size: circuit board: 122*87*17mm; with case: 144.8*91*40 mm