... .6V Ultra Small: Built-in 2.4GHz antenna, small size, 12x19mmNRF24L01+ wireless module ApplicationsMouse, keyboard, wireless headsets, intelligent sports equipment, remote controls, voice ... + / - 60 ppm crystalThat needs only an external antenna matching inductorNo multi-layer PCB5V input tolerance levelNo external level shifterImproved ShockBurst and serial interface ...