GKC Part #415 Model 605 Monitor Amplifier (replaces the model 600)

A high fidelity amplifier that is compact, rugged and light weight. Operates the same as the Model 600 but with more features. It has two independent output channels for an earpiece or headset. Features include: a battery drawer, low battery light, RJ-11 modular jack, and an external DC power jack, center pin positive. The RJ-11 jack is used on a telephone line. The XLR 3 pin jack is used for all other audio input, wet or dry feeds.  Specifications: Balanced input 600 ohms, female XLR-3 connector for wet or dry input RJ-11 modular jack for telephone line input Output 8 ohms impedance, 1/2W two independent amplifier channels, 1/4" (6.3mm) standard and 1/8" (3.5mm) mini Dimensions: 4-1/4" H. 2-1/4" W. 1-1/4"D. Powered by 9V alkaline battery or regulated external AC Adaptor center pin positive Low Battery Light Diode protected circuit polarity Thermally protected transformer Total quiescent current 5mA Die cast aluminum body with black texture finish Belt clip