1 Channel Relay Board Module 5V Low Level Trigger Relay Expansion Board Raspberry Pi 4 Model B (4GB Ram) operating on VHF/UHF 144-148MHz /

operating on VHF/UHF 144-148MHz / 420-450MHz

and consider using external antenna connectors available on some TTGO variants for further range extension

At lower resolutions through binning or cropping

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Build custom 3D printers and CNC machines at home

1 Channel Relay Board Module 5V Low Level Trigger Relay Expansion Board Raspberry Pi 4 Model B (4GB Ram) operating on VHF/UHF 144-148MHz /1 Channel Relay Board Module 5V Low Level Trigger Relay Expansion Board 1 Channel Relay Board Module 5V Low Level Trigger Relay Expansion Board Product description: This module is in line with international safety standard, control areas and load area have the isolation groove. Have power and relay operation instructions, connect the light will on, disconnect the light will off. When signal input, the public end and often start conduction. Can be used