Omega powder trickler, manufactured early 2011. It's a relatively new product and their design has changed slightly since this one was built. This one was used for weighing fewer than 100 charges, not even enough use to burn out the original (2) AA batteries, and is in perfect working order.
It has a 2-speed motor and you can further fine tune the delivery rate to suit your particular powder by propping up the front end of the platform to adjust the delivery tube's tilt.
Compared to a manual trickler, you can operate it with one hand, this lets you sit with your head positioned so you have the best view of the scale's balance lines, and you're not affecting the scale's reading by pressing on your reloading bench as you do when you hold down a twist-type manual trickler.
New, these retail for $65 and this one is yours, shipped anywhere in the continental US, for $40. You can follow the hot link (at top of post) for more details.