Specification :

Environment -15°C to 40°C (59°F to 104°F) 10% to 90% Relative Humidity Indoor Use Only

Power Supply-9V Alkaline battery, or AC/DC

Power Supply 9V to 12V Output Current 500mA

Dimensions and Weight-21.0cm x 12.5cm x 3.3cm 0.45 kg

Amplitude Accuracy-± 2% (Lead II)

BPM Rate -30,45,60,90,105,120,135,150,180

BPM Rate Accuracy-± 1BPM

Amplitude (MV)-0.5,1.0,2.0

Square wave - 1mv 2HZ