This is the desktop version. The box says it's a limited edition but the only possibly unique number I can find is a serial number on the box, which is ME-DTN023013. Comes with 3 A batteries. I tested it just before listing and I'm happy to say it works! Offered at $30 including shipping ($31 Paypal) east of the Mississippi, add $5 for west of the Mississippi. Email firstname.lastname@example.org if interested.