NRF52840 is a high-performance, low-power; Development Board Compatible With Nice Nano V 2.0 Charging Management Pro Micro NRF52840; It is designed for versatile applications in electronic module development, making it ideal for both hobbyists and professional projects; The NRF52840 Development Board is a high-performance integrated circuit compatible with Nice! Nano V 2.0, featuring Bluetooth and charging management capabilities; he NRF5280 development board has a 3.7V lithium battery interface and a software switch that can cut off the power of the LED. When turned off, the standby power consumption can reach 1mA; The NRF52840 chip uses an ARM Cortex-M4F processor, clocked at 64MHz, with built-in 1MB of flash memory and 256KB of RAM