Adopts I2C (TWI) communication protocol which greatly simplifies the communication process of NRF24L01and improves the efficiency of project development; Each module is as I2C (TWI) slave (address 35); Smooth two-way communication regardless of the slave and master; Maximum transmission distance can reach 70m (only for production test); Wireless communications chip NRF24L01 reliable communication protocol reducing data loss; I2C/TWI protocol greatly simplifies the communication lines; Perfectly compatible with arduino; Applications: Robot control remote control and Information collection etc.; Note: The wireless communications may have radiation not recommended for use in life protection