Products trademarked HQRP are marketed and sold exclusively by Osprey-Talon. 2-pin version, it is easier to insert and it will leave only 2 little holes instead of 4! General Features: Digital large size LCD display; 2-pin version; Model # JT-2G; Test Range: 5% to 40%; Resolution: 1%; Accuracy: ±1%; Measuring Range: 5% - 40%; High resolution and quickly response; Can hold value; Symbol and unit display, read and get conveniencly Low battery symbol "-+"; Power: one 9V battery INCLUDED; Dimension: 126x70x29mm; Operation temperature: 0'C to 40'C. Here is our buyer's feedback: I got this for checking firewood. Works great