It is compatible with 0.9-inch/1-inch/1.1-inch/1.1-inch ESP8266 ESP-12E NodeMCU development board 30Pins GPIO 1 to 3 expansion board, you can plug in 2.54mm male or female headers directly, or you can connect bare wires via terminals Terminal spacing is 3.5 mm/0.14 inches, suitable for 24~18AWG cable connections Four additional voltage output pins for easy connection of more devices Fully assembled, no soldering required Specifications: ESP8266 Expansion Board Product type: Expansion Board Material: PCB Supply current: 500mA Working temperature range: -20C~70C Power supply voltage: 5V Note: Depending on the batch, the printed words on the product will be different, which does not affect use Colour:Black+Green Package Contents: 1 x Expansion Board Only the above package content, other products are not included. Note: Light reflection 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.