1. Material: PCB 2. Working voltage: 3.3 or 5V 3. On-board AMS1117 - 3.3 chip 4. Wireless module operating voltage is 3.3V, while the ordinary 51 single-chip is 5V 5. Connect wireless module with 51 single-chip system board 6. It is for NRF24L01 + wireless module 7. This is a simple socket board which is for NRF24L01 wireless module
