NRF24L01 + wireless module 2Mbit / s 1Mbit / s 250Kbit / s transfer rate MultiCeiver hardware to provide the 6 receiver functions at the same time + / - 60 ppm crystal Only need an external inductance when match antenna No multi-layer PCB 5V input tolerance level No need external level converter Improved Shock and serial interface can be easily connected with a of low-cost MCU No MCU with SPI Interface 20 pin 4x4mm QFN leadless package very few external components The 2Mbit / s rate when the current 12.5mA received The 2Mbit / s rate @ 0dBm output current of 11mA 2Mbit / s rate of only a small average current 400nA Power-down mode, power consumption Power consumption of 32uA in standby mode 130us fast switching and time With on-chip voltage regulator oltage regulators In the 1.9 to 3.6V low voltage operation Possible to reduce noise Application: Mouse, keyboard, wireless headsets, intelligent sports equipment, remote controls, voice applications, security devices, VOIP applications. Colour: as shown Material: PCB Size: 18 x 12 x 2mm Package Contents: 5 x Module Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.