Sony Digital Voice Recorder

I’ve been trying out Sony’s ICD-MS515. It’s a tiny device that will let me easily record meetings, speeches and etc. HOWEVER, there’s a few problems. a) I can’t figure out how to turn the thing off and the manual makes no mention of it b) The buttons are easily and accidently pressed. There is a “hold” button to prevent this from happening, but this device shows how miniaturization has its limits.