Features:1. Wireless Key Finder: 1 transmitter and 4 receivers for locating any items like keys, wallet, tv remote control, purse,glasses whatever you need to find.2. Strong Signal Design: 30-40m(98-131ft) transmission range, radio frequency can penetrate through walls, floors, etc.So you can easily find your items.3. Easy to use: with just one press on the color-coded button, the loud beeping sound and flashes will lead you to find the lostitems.4. It has a led flashlight on the transmitter, very convenient to find your lost key and other items even in darkenvironment.5. The transmitter is equipped with a base, so it can be placed onto the tea table, TV cabinet, bed, computer desk orbookshelf. Specification:Condition:100% Brand NewMaterial: ABS shellColor: As Pictures ShownFrequency: 433.92 MHzBattery (transmitter): AAA, 1.5 V 2 (for transmitter, not included) CR2032 button battery (including receiver)Voice: 75-80DbTransmission range: 30~40 meters Package list:1 * Transmitter4 * Receivers1 * Base4 * Double Sided Sticker4 * Round Buckle1 * Manual