Features: *Made of high-quality materials, sturdy and durable *Multi-function 1 transmitter 4 receiver, can find multiple items at the same time. * No APP required, simple operation, just 1 click and sound reminder. *The receiver uses CR2032 coin cell batteries (not included), 1 battery can last up to 6 months. *The sound is loud, the volume is 75-80 decibels, and the search distance is 15-30m/49.2-98.4ft in diameter. *Convenient to hang keys, wallet, remote control, glasses, cell phone, dog collar or other things that are easily lost. Specification: *Item Type: Wireless Key Finder *Material: ABS *Weight: approx. 116.0g/4.1oz *Operating frequency: 433.92MHz *Working distance: about 15-30m/49.2-98.4ft (open space) *Volume: 75-80 dB *Transmitter Batteries: 2 AAA batteries (not included) *Receiver battery: CR2032 (not included) Package includes: 1X Base 1X transmitter 4X receiver 1X Manual 4X keychain 4X double sided tape Notes: 1. Due to factors such as display brightness and light brightness, the actual color of the product may be slightly different from the website picture. 2. Please allow a slight deviation between the data and the manual measurement. GLFILL 4 in1 Wireless Remote Lost Finder Remote Control Finder Key Locator w/ LED Light Easy to install and reliable to use. Solid and durable, long service life. Pls kindly check the decription before you order. Any other in need pls contact with us directly Brand new and high quality