Here are specs from Pete Cornish's website:
The PETE CORNISH P-2™ is highly recommended for a fat, high-gain, searing lead sound and is perfect for solos and heavy rock rhythm work. This pedal is used prominently by David Gilmour of Pink Floyd and Paul McCartney. The P-2™’s full, bright sound cuts through the mix effortlessly and was the recipient of the Editor's Pick Award from Guitar Player Magazine, receiving the following review:
High Impedance RFI rejecting input and bypass buffer.
Each unit is hand built, wired and tested by Pete and Lynda Cornish.
Housed in a Rugged Die-cast box with ‘Chicken-Head’ pointer knobs.
Heavy Duty all-metal footswitch with Hi-Brite, low power consumption LED.
Easy battery replacement via the ‘drawer’. The battery is switched on when you insert the “IN/PWR” jack and to ensure long battery life unplug this lead when the unit is not in use. If the unit is not to be used for a long length of time we recommend that you remove the battery. Preferred battery type is MN1604.
Also fitted is an input for a DC adaptor: the size of the coax connector is 5.5/2.1mm and the centre pin is negative (-VE). The voltage rating of the adaptor should be noise free, fully stabilized at 9.6V and capable of supplying 20mA. We recommend the use of the BOSS PSA series adaptors (PSA-100/110/220 or 240 depending on your local AC supply voltage) as meeting the above criteria and cannot accept any liability for damage caused to this unit by the use of any other type of AC/DC adaptor.
Although the current consumption of our Stand Alone pedals is extremely low, giving an extended battery life, it may be appropriate to use an AC/DC Adaptor for long term usage. If a single pedal only is in use then the Boss PSA series will be cost effective but we do not recommend this unit for powering multiple effects as ground loops can become troublesome.
After extensive testing for both noise, stability and reliability we have pleasure in recommending the Voodoo Lab Pedal Power 2 Plus as being suitable for powering our range of stand alone pedals - particularly when multiple effects are in use. The isolated outputs of the Pedal Power 2 Plus prevent the occurrence of ground loops and the noise level is too low to measure.
Dimensions: 171 X 121 X 55 mm