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Designed to switch on, an on-board relay when u whistle. Whistle again, and it switches off. Relay is rated at 5Amps, 220Vac. The whistle frequency can be adjusted, by means of a preset pot.
12VDC TEMPERATURE CONTROLLER BOARD | XH-W1209
DC-DC BUCK CONVERTER LM2596S STEP-DOWN MODULE
DC-DC BUCK CONVERTER XL4015 STEP-DOWN MODULE
EFK 12001 Infra -Red Link
EFK 12002 Infra -Red Remote Control
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