Anti-loss, Anti-theft, State-of-the-Art Bluetooth Smart Proximity Key Fob to Protect Smartphone & Valuables, for iPhone & Samsung Galaxy. "SMART NUDGE" Protect your smartphone contains private information as well as your valuables. Protect your smartphone from theft or loss by sinultaneously ringing smartphone and Smart Nudge when they are out of the active distance(7-30feet) you already set on Smart Nudge App in smartphone. "Find Me" to Find Valuables; Press "Find Me" button on Smart Nudge App, and you can find valuables easily by ringing Smart Nudge. Find Smartphone: Press the button of Smart Nudge, and you can find smartphone easily by ringing samrtphone. Free Smart Nudge App Dowmnload from "Google Play" or "Apple Store". Battery Lithium Coin Cell CR-2016: 6 months lifetime.