BBC MICRO BIT V2 Go - Complete Starter Kit , Pocket size computer for learn to code

Nordic nrf52833 Processor

with 512kb flash and 128kb ram, 5x5 led display matrix; 25 red LEDs with 255-step intensity control

Two Programmable Tactile Buttons for User Functions

a new notched edge connector that makes it easier to connect things like crocodile clips and conductive thread, mems microphone with led indicator

Onboard Motion Sensor and Temperature Sensors 

bluetooth 5.1 connectivity with bluetooth low energy (ble), ideal for communicating with other devices such as smartphones and tablets