Product Name: Wireless Key Finder for Wallet Tracker RF, Cell Phone Item Locator Keychain with 6 Receivers Model NO.: WF8 Receive Frequency: 433.92MHz Alarm Volume (within 1m): ?80dB Transmission Mode: Wireless Working Principle: Electro-Optical Type Application: Indoor Certification: CE, FCC, RoHS Working Mode: Passive Signal Transmission: Wireless Alarm Type: Home Alarm Function: Help to Find Things Including: 1 Transmitter, 6 Receivers Trademark: LinDaK Transport Package: Package Origin: China Shenzhen Product Description Features:Never lose anything again: a tiny Bluetooth tracker and easy-to-use that helps you find everyday items in secondAttach to anything: designed with a convenient hole, easily hook onto keys or stick to anythingRing it, Find it: press the button and make it ring when you get closeFind your phone: simply press any of your remote control to make your tracker ringOperation1. Attach the color-coded receivers to your frequently lost items with the key rings or double sided adhesive tape.2. Press and release the corresponding color-coded button on the transmitter.3. If the receiver is in range, it will beep and meanwhile the LED indicator will flash.4. If no beep is heard, change your location or use new batteries and press the button again.Specifications:Sound: 80dB (According to the research, 80db is the best acceptable volume for people to hear, it also loud enough for people to hear in 100ft(open space). If higher more, it will has higher power consumption, and too loud for people to hear in the house.)Wireless range: 100ft(open space)Wireless frequency: 433.92MHzPackage Included:1 x Transmitter ( including the battery)6 x Receivers ( including the battery)1 x base6 x Mini double-side sticker6 x Key Chain1 x User Manual