Wide range of applications Small size Simple to use Support DC5-60V power supply It is suitable for ESP32 secondary development and learning, smart home wireless control and other occasions. Onboard and stable ESP32-WROOM-32E module, -capacity 4M Flash; The I/O port and UART program download port of ESP32 module are all led out, which is convenient for secondary development; Power supply voltage DC7-60V; Onboard ESP32 module IO0 programmable button and reset button; ESP32 supports the use of for IDE development tools, providing reference programs in the for development environment; On-board 2-way 5V relay, output switch signal, suitable for controlling the load whose working voltage is within AC250V/DC30V; 1 programmable LED and relay indicator onboard. Colour: as shown Material: PC+metal Package Contents: 1 * Development board 2 * Double row needles 1 * Single row needle 1 * Single line cap Only 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.