1: Wide range of applications2: Onboard and stable ESP32-WROOM-32E module, -capacity 4M Flash3: The I/O ports and UART program download ports of the ESP32 module are all led out to facilitate secondary development4: Power supply voltage AC220V/DC5-30V5: Onboard ESP32 module IO0 programmable button and reset buttonBoard size: 93 x 87mmWeight: 92gUsage: : Time RelayVoltage: 220VModel Number: ESP32-WROOM development boardProtect Feature: SealedPower Source: DCContact Load: Low Powername: esp32 relayfeature: wifi relaycolor:As shownMaterial:PC+MetalPackage Contents:1 x AC/DC power supply ESP32 four-way relay module2 x 10 double row PIN1 x 6 single row PIN41 x Single line capOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.