Missing Knob - Made in Japan, Not the original Box,  Has crack on side of pedal but does not affect the usability in any way. DBX 1252 Processing Chip - early 90's . Indicator Light is not as bright as it should be. 
Sticker on bottom has been removed. Probably from being mounted on a pedal board.  

IMPROVES YOUR OVERALL TONE

The CS-3 Compression Sustainer pedal compresses louder signals while boosting lower signals, providing smooth sustain without degrading the original sound quality. This is the perfect pedal for guitarists and bassists who want to sound their best.



Nominal Input Level-20 dBuInput Impedance1 M ohmNominal Output Level-20 dBuOutput Impedance1 k ohmRecommended Load Impedance10 k ohms or greaterBypassBuffered bypassControlsSUSTAIN knob
ATTACK knob
TONE knob
LEVEL knob
Pedal switchIndicatorCHECK indicator (Serves also as battery check indicator)ConnectorsINPUT jack: 1/4-inch phone type
OUTPUT jack: 1/4-inch phone type
DC IN jackPower SupplyCarbon-zinc battery (9V, 6F22)
Alkaline battery (9V, 6LR61)
AC adaptor (PSA series: sold separately)Current Draw11 mAExpected battery life under continuous useCarbon: Approx. 14.5 hours
Alkaline: Approx. 34.5 hours
*These figures will vary depending on the actual conditions of use.AccessoriesOwner's manual
Leaflet ("USING THE UNIT SAFELY," "IMPORTANT NOTES," and "Information")
Dry battery/9 V type (6F22)Options (sold separately)AC adaptor: PSA seriesSIZE AND WEIGHTWidth73 mm
2-7/8 inchesDepth129 mm
5-1/8 inchesHeight59 mm
2-3/8 inchesWeight390 g
14 oz