Features: 1. Using I2C (TWI) communication protocol, which greatly simplifies the communication process of NRF24L01. Users do not need to understand the complicated NRF24L01 communication process, which greatly improves the development efficiency. 2. Each module is a l2C (TWl) slave (address: 35). 3. Smooth two-way communication, regardless of slave and host. 4. Maximum transmission distance can reach 70m (for reference only). 5. Adopt NRF24L01 as wireless communications chip, reliable communication protocol and reducing data loss. Perfect compatible with arduino. Specifications: Condition: 100% Brand New Material: ABS Operating Voltage: 5V Hold time of Module receives the data: more than 2S Hold time of Module sends data: more than 300s Transfer rate: 50Byte/S (theoretical value) I2C/TWI Address: 0x47 (decimal 35) NRF24L01 Address: 0x34, 0x43, 0x10, 0x10, 0x01 (from low to high) Size: Approx. 4.5 x 2.2 x 1.1cm / 1.8 x 2.2 x 1.1inch Weight: Approx. 4.6g Packing List: 1 x Module 1、Using I2C (TWI) communication protocol, which greatly simplifies the communication process of NRF24L01. Users do not need to understand the complicated NRF24L01 communication process, which greatly improves the development efficiency. 2、Each module is a l2C (TWl) slave (address: 35). 3、Smooth two-way communication, regardless of slave and host. 4、Maximum transmission distance can reach 70m (for reference only). 5、Adopt NRF24L01 as wireless communications chip, reliable communication protocol and reducing data loss. Perfect compatible with arduino.