SMAKN&reg; Mini NRF24L01 + 2.4GHz SMD Wireless Transceiver Module for Arduino NRF24L01 + wireless module. Low working voltage: 1.9 ~ 3.6 V. High rate: 2 Mbps, due to the air transport time is very short, greatly reduce the collision phenomenon in the wireless transmission (software setting 1 Mbps or air transmission rate of 2 Mbps). Multi-frequency points: 125 frequency points, meet the requirements of multipoint communication and frequency hopping communication. Subminiature: built-in 2.4 GHz antenna, small size, 15 x29mm (including the antenna).