USB male A interface Multifunction(Multipurpose) DC/DC 5V to 3.3V Voltage Regulator module. Input DC 4.5-7V(USB male interface input OR 2.54mm Pin input). Output: 3.3V/800mA (load current can't more than 800 mA). 3 functions : USB to 3.3V;USB to 5V(5V to 5V);5V to 3.3V. Applications: for /for /esp8266 for Arduiuo DUE for AVR PIC STM32 C8051 MSP430 Zigbee CC2530 Wireless module : Nrf24l01 Nrf24lE1 CC1101 CC2500 SI4432 SI4463 FPGA/CPLD:Altera EPM240/EPM570/EP4CE6; Xilinx XC2C64A Wireless communication equipment Color: Red Material: PCB+Metal Package Contents: 1* USB DC 5V to 3.3V Voltage Regulator Module 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.