New Arrival China F4 Key Finder

• The key finder F4 is a smart and tiny tracking device.
• It is developed based on a new kind of Bluetooth radio system. 
• The F4 not only help you to find your stuff where it is, but also help  you to keep your stuff never lose again.
• It is easy to be attached to your wallets, bags, car keys, remotes and other stuff.
• Find & anti-lost function
• LED and buzzer indication
• Replaceable coin battery
• Ultra-low power consumption chipset nRF52 series with ARM core
• External ON/OFF push button to save the battery lifetime
• Easy to print a customization Logo/branding on the case
• Ultra thin Portable device, keychain and neck string available for Optional