http://inklingsandyarns.com/2012/05/chores/ 
MGT-1620 16.5VAC 20VA Class II Power Supply
- Input: 120V 60Hz
- Output: 16.5VAC ~ 20VA
- Class II power supply
- 2 ground prong
- Two screw terminal output
- Individually boxed
- LED AC power input indicator
- UL and CUL listed
