One More Transmitter: 4 *Receiver, 2* Transmitter, 1* Adhesive hooks, 4* Key Rings, 4*Double-sided Adhesive in package, adhesive tape and rings are offered to place the transmitter, you can find right place for easily reach. For details,please refer to the user manual. Ensure Longer Usage: With 4 CR2032 lithium cells, the key finder receiver can last for 12 months in standby time. Lower power consumption in working make its lifespan is longer than other receivers. No provided AAA battery in transmitter,so you need to buy 2*AAA battery for the bigger switch, the smaller one has already equipped with battery. Louder Enough to Remind: Once you press the corresponding ABCD-Named button on the Transmitter, the receiver will emit a loud 85db+ beep when the items are nearby. This wallat finder is loud enough for anyone to hear the sound even in long distance for elder people with poor sound ability. Tag & Set-up: NO needed phone or App. Simply one-tap setup instantly by press on the corresponding ABCD-Named buttons in Transmitters to track certain item quickly. Receiver sounds/beeps, leading you to track your lost item within 50 meters/ 164 feet in open area. Quickly Locate Your Lost Items: Worries about finding your lost Key, Remote, Wallet in a messy house? This quick set-up key finder can locate your lost ones in seconds with loud alarm sound.This item tracker work perfectly for those ones who feel trouble to remember the exact locations or just forget to put the item in right places.