5 PCS 5v 1 Channel Relay Module for Arduino

Product introduction: 1. this module is in line with international safety standard, control areas and load area have the isolation groove; 2. USES the loose quality goods relay; 3. have power and relay operation instructions, and bright, disconnect the dawn; 4. signal input signal, the public end and will often start conduction; 5. can be used as a microcontroller development board module, can be used as a home appliance control; 6. dc or ac signal control, can control 220 v ac load; 7. and one often opened a normally closed contact; 8. blue terminal line more convenient. Package include: 5x 1 Channel Relay Module