... voltage: 1.9 ~ 3.6V Ultra Small: Built-in 2.4GHz antenna, small size, 12x19mmNRF24L01+ wireless module ApplicationsMouse, keyboard, ... , intelligent sports equipment, remote controls, voice applications, security devices, VOIP applications2Mbit / s 1Mbit / s 250Kbit / s transfer rate of ... layer chip design easier to make software2Mbit / s high-quality VoIP makes it possible2Mbit / s 1Mbit / s 250Kbit / s ...