This tea light with very bright yellow LED fits into a 38 mm holder and is ideal for home, parties, Christmas, Halloween, etc. It cannot be blown out by the wind and is safe for children and pets. Three different functions are available: a realistic flicker, a stable flame and slow on/slow off. After 5 hours, the candle automatically switches off to save battery power. This educational soldering kit works with a 3V CR2032 button cell (not included).