this is poorly designed [SEP] while this aoraem collector can pick up some small particles the suction it produces isn t that great so it leaves a lot behind if you add the small hose attachment then its suction power lessens even further it was doing a halfway decent job at cleaning my keyboard but the attachment kept falling off the little bristles aren t really helping anything and they are very harsh on my large mouse pad which is what i mostly use these for my old collector has a small lever you push to turn it on the aoraem requires you to turn the entire top half of the unit to power it that s fine for turning it on but when you try to turn it off it can loosen the bottom tray and the particles spill out if you re not careful it is easier to replace the batteries on this model versus my other one but that s the only thing i like about it