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.Specifications:Model Number: ZT109Backlight Times:120 SecondsOperating Temperature: 0 - 40 Operating Humidity: less than or equal to 75%RHStorage Condition: -2060Storage Humidity: less than or equal to 80%RHDIY Supplies: ElectricalOperating Mode: Auto/Manual RangingMeasuring Inductance Range: noMeasuring Temperature Range: -201000 C/-4F-1832FMeasuring Capacitance Range: 9.99nF/99.99nF/999.9nF/9.99uF/99.99uF/999.9uF/9.999MFMeasuring Voltage Range: 999.9mV/9.999V/99.99V/999.9VMeasuring Current Range:60mA/600mA/10AMeasuring Resistance Range: 99.99/999.9/9.999k/99.99k/999.9K/999.9M OhmFrequency: 99.99Hz/999.9Hz/9.999KHz/99.99KHz/999.9KHz/9.999MHzSquare Wave Output: 50Hz/100Hz/200Hz/300Hz/400Hz/500Hz/600Hz/700Hz/800Hz/ 900Hz/1000Hz/2000Hz/3000Hz/4000Hz/5000HzAC Voltage(mV): 9.999mV/99.99mVAC Voltage(V): 999.9mV/9.999V/99.99V/750ACV(999.9DCV)AC Current (mA&A 9999mA9999ADCAC Current (uA): 99.99A/999.9ADisplay Type: Digital DisplayDiode Test: YesContinuity: YesDuty Cycle: 1%-99%Sample Rate: 3 times per secondPower: 2 * 1.5V AAA batteries(Not Included)Colour: Red + BlackMaterial: ABSSize: 65 x 130 x 32 mmPackage Contents:1 x Multimeter (not including battery)2 x test leads1 x manual