Function: 1. 1 Control 4: Equipped with four key finders, you can set the receiver to four items and just press the color button to find them. 2. Simple method of use: just follow the instructions in the manual, you can use and operate easily, and find your item successfully. 3. Sound and light function: Equipped with light and sound prompts, when the equipment receiver emits a sound, it will guide you to lost items. It is also equipped with a light to improve visibility at night. 4. Professional Design: It comes with a radio frequency that can penetrate walls, floors, cushions, skin, etc. to help you find items. 5. Small Size: Light and portable, it can be easily held in various places for searching without taking up extra space. Specification: Item Type: Key Finder Material: ABS Remote control size: Approx. 10.5 x 4.5 x 1.2 cm / 4.1 x 1.8 x 0.5 inch Weight: Approx. 131g / 4.6oz Remote control battery parameters: 2xAAA batteries (batteries not included) Single locator battery parameters: 1xCr2032 button battery (battery not included) Scope of application: applicable to any item. Package List: 1 x remote control (no battery) 4 x locator (no battery) 1 x base 1 x accessories 2 x stickers 4 x key ring 1 x English manual