Specifications:

• 1 channel
• 100X and 1000X gain
• 60 Hz Notch Filter
• on/off toggle switch (no LED indicator)
• Input: G1, G2 and Ground via 5-pin DIN connector (Preh type)
• Output: BNC
• Powered by 2 12V alkaline batteries type: A23
• Metal enclosure (robust to student abuse)