Excelity Relay moudle is useful to control a motor, a led strip, or any other mcu module. Just connect a digital output of your microcontroller to the relay module, and you can control a power-demanding appliance with the digital signal provided by your microcontroller.

Specification:
-Control signal: TTL
-Rated load: AC125~250V/10A, DC28~30V/10A
-Max. switch voltage: 250VAC, 30V
-Trigger Voltage: 0-1.5V (LOW); 2.5-5V (High)
-Trigger Current: 2-4mA (Max. Load Current: 190mA)
-Product Size: 50.6mm * 38.8mm * 19.3mm (2.0" inch *1.5 inch * 0.8 inch )

Here the introduce for input & out connection:
1)Input Connection:
DC +: Positive power supply (VCC)
DC-: Connect power negative ( GND)
IN1-IN2: Control the pick up of replay by low level or high level
2)Output Connection:
Left Connection: “NO” means “Normally Open”
Middle Connection: “COM” means “Common”
Right Connection: “NC” means “Normally Closed”