This amp features the following:

Hand matched Vishay/Dale resistors
CRD Biased for Class A
50k volume potentiometer
mini toggle switch for power
3.5 mm (1/8" mini-style) stereo source and headphone jacks
1 x 9 volt battery
Orange LED power light
AD 8620 op-amp
Panasonic 470uF/16V power caps
1.0 uF 100V input caps
Stock gain set at 10.88

$75 + shipping (from ontario)

amp is just broken in maybe ( 15 hours ). I have moved on to a headsave amp and a porta corda amp. You can't beat the novelty of the Altoid tin amp though - a conversation piece for sure. I found it a great match for Senn hd600,hd650 and Akg501.