ITEM NAME:10pcs 3.3V Wireless Adapter Module Socket Adapter Board for 8Pin NRF24L01 Product Description Description: Feature: The working voltage of wireless module is generally 3.3v, while that of 51 single chip computer is 5V. Suitable for 8 pin NRF24L01 + module Specification: On AMS1117 chip Product size: 25.5*21*15mm/1*0.82*0.59'' Note: Please allow 1-3mm differs due to manual measurement. Due to the different display and different light, the picture may not show the actual color of the item. Thanks for your understand. Included: 1 X Wireless Adapter Module Socket.Suitable for 8 pin NRF24L01 + module. Included: 1 X Wireless Adapter Module Socket. Due to the different display and different light, the picture may not show the actual color of the item. If item is defective after 3 months, you can still send it back to us.