Xcellent Global Wireless RF Key Finder Item Locator Indoor Pet Finder with Base Support and LED Flashlight, Remote Control Keys Caller Locator Kit M-HG053 Find lost keys and other easily lost items quickly with just one press on the color and number coded button, the beep sound and flashes will lead you to find the lost items ON/OFF button which located at the right side of the transmitter allows you to turn on or off the flashlight easily. This becomes extremely handy when you need to find something in the dark Set consists of one remote control (transmitter) and 4 receivers (blue, green, red and purple) which can be controlled independently. The loud beeping sound & flashlight on the the receiver will lead you to your losaSet consists of 1 remote control and 4 receivers which can be controlled independently, serves 4 units at the same time and covers a range of up to 100 feett item One transmitter, four receivers correlated with the four big buttons on the transmitter Transmitter require 2 x AAA-batteries (not included), Receiver requires 4 x CR2032 button cell batteries (included) and addition 4 Bonus CR2032 button cell batteries included.