1. The signal generator is small in size, has many functions, easy to operate and easy to carry.2. The key layout is reasonable, all functions have independent corresponding keys, easy to operate.3. Built-in battery, low power consumption, long standby time.Features:With large display screen, which can let you operate and see the data more clearly.With the backlight and flashlight function, it is more convenient for you to use and read in the dark.Auto power off function: Without any button operations in about 15 minutes, the meter will automatically shut down to save energy.Portable size and easy to carry, you can easily take it with you and use it wherever you need it.With the data hold function to give you a better using experience.Specifications:Material: ABSPower: 2 * AAA battery (NOT INCLUDED)Direct current voltage:Ranges: 0.8V600VAccuracy: (0.5% +3)AC voltage:Ranges: 0.8V600VAccuracy: (0.8% +3)Frequency response: 40Hz1kHz TRMSFrequency:Ranges: 4Hz200kHzAccuracy: (1.0% +3)28C).Max. voltage between terminal and ground: 600VItem size: 125 * 65 * 20mm / 4.9 * 2.6 * 0.8inItem weight: 120g / 4.2ouncePackage size: 167 * 94 * 50mm / 6.6 * 3.7 * 2.0inPackage weight: 248g / 8.7ouncePacking list:1 * HT125B Multimeter1 * Pair Testing Pen