Chris 4 in 1 Wireless Key Finder Tracker Locator with LED Flash Light and Docking Base for Keys, Remotes, Eyeglasses &uml;C 1 RF Transmitter and 4 Receivers 1.1 RF transmitter (Remote Control) with big buttons and 4 receivers for locating different items C keys, remote controls, glasses or other items. 2.30-40m(98-131fts)transmitting range, so that you can locate the items easily at most of corners of your house. It is with strong signals even if through floor or walls. 3.With a docking base, It 's a good display for tea table, TV bench, bed, computer desk, or bookshelf. 4.Easily and quickly to locate/find easily lost items, by pressing on the related color buttons, the beep sound and LED flashes will lead you to find the lost items 5.With LED flash light on the transmitter, it is extremely handy when you need to find something in the dark.