And yes, like other comment: this keychain is absolutely useless since it is triggered when any sharp sound, however small, and is very shrill; unbearable really.
Buy 2 door keys, they trigger at the slightest sound (speech, crying children ....) and sometimes spontaneously so that after 5 minutes was removed batteries ....
For those who spend their time looking for their keys, it's perfect! Only drawback, it is very sensitive because it triggers the screeching chalk on a blackboard! What has not failed to make the students laugh!
I was very happy to receive this small key door as my husband often loses these keys, but the problem is that the key holder at the slightest noise sounds somewhat acute.
