Quality control seems to be an issue. Pelz charge for returns. Second. Had a pair previously and decided to order another. Über die Funktionen lasse ich mich hier nicht umfassend aus. Camera quality is good. For the price, I would expect them to have lasted much longer. Da ich für den Preis "klanglich" aber keine Alternative kenne, werde ich Sie mir erneut bestellen. It didnt work it didnt locate anything it was attached to and all it was good for was an additive to my keychain. Troppe piccole.