Characteristics: 1. Wireless key finder: 1 transmitter and 4 receivers for locating items such as keys, wallet, TV remote control, purse, glasses, and more. 2. Strong signal design: transmission range of 30-40m (98-131ft), radio frequency can penetrate walls, floors, etc., allowing you to easily find your items. 3. Easy to use: With just a press of a color-coded button, a loud beep and flashing lights will help you locate lost items. 4. The transmitter features an LED flashlight, making it convenient to find keys and other items even in dark environments. 5. The transmitter comes with a base, allowing it to be placed on a coffee table, TV cabinet, bedside table, computer desk, or bookshelf. Specification: Material: ABS coating Color: as shown in the pictures Frequency: 433.92 MHz Sound level: 75-80dB Transmission range: 30-40 meters Package includes: 1 x Transmitter 4 x Receivers 1 x Base 4 x Double-sided sticker 4 x Round buckle 1 x Instruction manual