Features 1. Searching: When you want to find the lost keys/bags/luggage/pet and other things, just press the matching button on the transmitter. The corresponding receiver will sound alarm; it will last for 7-9 seconds and then stop automatically. 2. Lighting function: the light will on when press the button on the broadside, and off when press again. Attentions: Please change new battery for transmitter and receivers when the searching distance becomes shorter. 3. One transmitter, four receivers correlate with four large buttons on the transmitter. Suitable for personal use, family use, gift and promotional purposes, etc. Specification Material: ABS Color: Black Package Includes: 1 x Key Finder 4 x Receivers