GREAT VALUE! - This tiny Coin Inverter is just bigger than the size of a quarter. The driver can power 1.5 feet of electro luminescent wire efficiently with its four coin cell batteries. This el inverter can be put just about anywhere due to its miniscule size. Use it to power your miniature El wire needs. The Coin Cell Driver has on/off/blink switch. FREE 4 Batteries included - a $4 value!