Characteristics: 1. Wireless Key Finder: 1 transmitter and 4 receivers to locate any items such as keys, wallet, TV remote, purse, glasses, whatever you need. 2. Strong signal design: 30-40m (98-131ft) transmission range, radio frequency can penetrate walls, floors, etc. So you can find your items easily. 3. Easy to use: just one press of the color-coded button and a loud beep and flashes will lead you to find lost items. 4. It has a led flashlight on the transmitter, very convenient to find lost key and other items even in a dark environment. 5. The transmitter is equipped with a base, so it can be placed on a tea table, TV cabinet, bed, computer desk or a bookshelf. Specification: Material: ABS shell Color: as shown in the photos Frequency: 433.92 MHz Voice: 75-80Db Transmission range: 30 40 meters Package List: 1 * transmitter 4 * Receivers 1 * base 4 * double-sided sticker 4 * Round Buckle 1 * Manual!