Review on Wireless FindKey Key Finder, RF Locator Anti-Lost Tag Alarm Reminder Tracker, 1 Transmitter with 4 Receivers, Ideal for Phone, Pets, Keychain, Wallet, Luggage, Pet Cat, Dog Tracking by Gene Taylor

Nice wire ring key finder that attaches the wireless finder to the key and looks "nice". Putting a dead battery in the viewfinder was the only minor issue. The battery cover opens with a coin by twisting it, but the cover does not open, it has to be 'pryed' open with a small flathead screwdriver, but I don't see how this could be designed any other way. When the cover is removed, the discharged battery can be inserted easily. As you reattach the cap, look for the tiny arrows (that look like dots) on the receiver on the small round cap, then lightly tighten clockwise and the receiver is ready. Put two batteries in the transmitter and you're done. Wonderful.