Can anyone recommend and outdoor ultrasonic rat repellent that isn't movement activated?

[felicitythemangyfox]

Just that really. Rats under the decking . It's getting torn out in a couple of months but I'd like encourage the little buggers to move out in the meantime.

Same question as this OP… there are lots on the market. Hopefully yours are gone OP.

Can anyone recommend me one that works outdoors please? We have no pets.

Anyone? Or have all the MNusers with rats -yuck-gone to bed already?!

I need these too. Do any of them work?