WS2812 Addressable RGB LED Ring - 8/12/16/24 LED Round rfid module A metal ball or mercury

A metal ball or mercury switch travels inside a sealed receptacle with two electrical contacts

4G ISM band

A coin-cell keeps the time running in the background

2 Balanced embedded

WS2812 Addressable RGB LED Ring - 8/12/16/24 LED Round rfid module A metal ball or mercuryAdd Bright Animated Lighting with RGB Addressable LED Ring WS2812 The RGB Addressable LED Ring WS2812 is an addressable LED product made for colorful effects, indicators, wearables, art builds, and interactive electronics. It is a strong pick when you want animated light patterns, per pixel control, or vivid RGB output. Addressable LEDs are popular in maker builds because they let you create eye catching lighting with a single data line on many