http://www.spiegel.de/spiegel/print/d-13682980.html (?Ein pfiffiges Produkt?).
https://www.test.de/Schluesselfinder-im-Test-Dauerpiepser-und-Datensammler-5006734-0/
[1] http://68.media.tumblr.com/5f85ee3e8b027e0253dcbe061019cce3/tumblr_oubphbaC4z1sofvubo2_1280.jpg
[2] http://68.media.tumblr.com/9f3d4f3aefc6962e9cac3996738894c1/tumblr_oubphbaC4z1sofvubo5_1280.jpg
[3] http://68.media.tumblr.com/5ae2ce0430f71b8e7975f577a212560c/tumblr_oubphbaC4z1sofvubo4_1280.jpg
[4] http://68.media.tumblr.com/f953d429ff425aa8c4ad7d10c2c7ec86/tumblr_oubphbaC4z1sofvubo3_1280.jpg