The Silverline Audio 9-volt power supply will keep your pedals rocking all night long and save you tons of money on 9V batteries. In fact, never buy a 9V battery again (for your pedals at least). The slim design helps to reserve valuable real estate on your power strip or wall outlet by occupying only one space.
Silverline Audio's aftermarket power supplies have been carefully analyzed for compatibility. They have a center negative pin that is required by these products. Do not use positive center pin power supplies with these units! It will damage them.
Silverline Audio aftermarket replacement AC Power for EHX/Electro-Harmonix Pedals:
Metal Muff
Germanium 4 Big Muff Pi
Little Big Muff Pi
Muff Overdrive
Double Muff - Fuzz Overdrive
Pocket Metal Muff
Big Muff Pi with Tone Wicker Distortion

*NOT compatible with Big Muff Pi Classic, which requires a special power adapter
Features:
Slim Design Frees up Space on Power Strip by Occupying One Outlet
Input Volt Range: 100-240V (Worldwide Compliant)
Safety standard compliant: FCC, CE, RoHS
Safety Features: High Efficiency and Reliability, Automatic Overload cut-off, Automatic Thermal cut-off, Short circuit and Over Voltage protection
Works with Optional Female-to-Male Daisy Chain Adapter Cable for Connecting Multiple Pedals
Specifications:
I/P AC:100V~240VAC
50-60Hz
O/P DC:9V DC 1A
Cord: 36in
Tip: (-)center, (+)outer