Callstel Set of 4 credit card size 4in1 key finder, GPS locator, app.

Save yourself the hassle of searching for misplaced items: Simply connect your new key finder to your mobile device via Bluetooth and then plug it into your wallet, key ring, handbag, etc. You can check where your items are at any time via the app. Thanks to its super-flat design, it is ideal for the credit card compartment of your purse.
Easy to find thanks to extra-loud signal tone: Via smartphone you trigger a virtually inaudible tone on your key finder. And vice versa: By key finder you trigger signal tones on your smartphone. So you can find everything again quickly.
Effective theft protection: If someone removes the key finder from Bluetooth range, an alarm sounds on your mobile device and/or on the key finder if desired. At the same time, the last registered location is automatically saved. Equip your bike, for example, with the clever finder!
Comfort extra for taking pictures: With a simple press of a button on the key finder, you can conveniently take photos with your smartphone. Ideal for successful selfies and group photos!
Fits perfectly in the credit card compartment of your wallet & Co. thanks to super slim design
Two-way function: trigger the alarm tone via smartphone on the key finder or via key finder on the smartphone
Theft protection: alarm sound on smartphone and/or key finder when Bluetooth connection is disconnected
Location marker: see the last location of the key finder in the app (uses GPS of the smartphone)
Remote trigger for smartphone camera: take photos by pressing a button on the key finder * Range outside: up to 50 m, inside: up to 20 m
Signal volume: 98 dB
Free app for Android and iOS: manage up to 5 keyfinders
Bluetooth for connection with smartphone and tablet PC
Power supply: permanently installed, non-replaceable Li-Po battery with up to 2 years runtime
Dimensions: 85 x 54 x 3 mm, weight: 10 g
4 key finder including German manual.