1: Wide range of applications2: Onboard mature 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: supply voltage AC220V/DC5-30V5: Onboard ESP32 module IO0 programmable button and reset buttonBoard size: 93 x 87mmWeight: 92gUsage: General Purpose: Time RelayVoltage: 220V Number: ESP32-WROOM development board Feature: Sealed Source: DCContact Load: Low name: esp32 relayfeature: wifi relaycolor:As shownMaterial:PC+MetalPackage Contents:1 x AC/DC 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 the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.