Features: Wireless key finder: 1 transmitter and 4 receivers for locating any items such as keys, wallet, TV remote control, purse, glasses, everything you need. Strong signal design: 30-40m (98-131ft) transmission range, radio frequency can penetrate walls, floors, etc. so you can easily find your items. Easy to use: With just one press of the color-coded button, a loud beep and flashes will lead you to find lost items. It has LED flashlight on transmitter, very convenient to find lost key and other items even in dark environment. The transmitter is equipped with a base, so it can be placed on a tea table, TV cabinet, bed, computer desk or shelf. Please allow slight dimension error due to manual measurement. Material: ABS shell Color: as shown in the pictures Frequency: 433,92 MHz Voice: 75-80Db Transmission range: 3040 meters List of packages: 1 * Transmitter 4 * receivers 1 * base 4 * double-sided sticker 4 * Round Buckle 1 * Instructions