AVANTEK Household No Need Setting Locator Device Kit Suit Tracker with LED and Beep Non-Bluetooth Locates lost keys and other missing items quickly with just one touch of the transmitter button; perfect for senior citizens, mothers of young children and busy employees in a hectic working environment Pre-programmed for immediate use with corresponding color coding on transmitter and receivers Receivers beep with a sound volume of 90 dB and a flashing LED effectively indicates the location of mislaid objects Item finder with advanced RF 433MHz technology; boasts a range of up to 40 meters in open space and 10 meters indoors; penetrates walls and cushions Kit includes a remote transmitter with 3 receivers; two in key fob design and one flat with a sticker and a clip for alternative attachment; kit requires 4 x CR2032 button batteries (included)