Support Bluetooth 5.0 (BLE single single mode).

Uses Half hole package which is easy for soldering and also DIP Package.

ARM Cortex-M4F Core 20MHz.

160KB RAM .

512KB Flash in chip, and support external flash up to 8Mbyte .

Application : Intelligent Lighting, Health Care, Intelligent Household Appliances, Intelligent Electricians, Portable Devices.