Features: 2 x 1.5V lithium battery AG12 for long standby time. Made of high quality stainless steel, it is quite durable. Auto-Off: 120 seconds, 2 minutes, auto shut off. The four-digit backlit LED screen allows you to operate it safely even in dark environments. Operation: 1. Press the [Φ] key and "zero" will appear. 2. Take out the scale figurine.Place the phonograph needle on the scale."o" displayed on the top left to read data