| All returns accepted | ReturnsNotAccepted |
|---|---|
| Brand | GKC Research & Development |
| Model | GKC Research & Development 650 |
| MPN | Model 600 |
Check the listing for details. GKC Research & Development MODEL 600 Monitor Amplifier. Condition: Used. Listed at 75.00 USD. FOR SALE IS THE ABOVE PICTURED ITEM. USES A 9V BATTERY (NOT INCLUDED). UNTESTED, UNKNOWN WORKING CONDITION. FREE US SHIPPING. CODE: VTV