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:1.Multifunction:Can measure AC voltage,AC current,resistance,capacitance,frequency,duty cycle,square wave output,diode and continuity.2.Portable design:There is a back bracket for supporting multimeter,convenient to operate.3.Clear to read:With large LCD backlight display and data hold,easy to read data.4.More advantages:Auto/manual range,true RMS,auto power off and over range indication.Specifications:Model:AN8008Display Counts:9999Diode Test:YesContinuity Test:YesSquare wave output:YesBacklight:YesData hold:YesAuto/manual range:YesAuto power off:YesOver range Indication:Yesvoltage:999.9mV/9.999V/99.99V/999.9V(0.5%+3),9.999mV/99.99mV(0.5%+3)AC voltage:999.9mV/9.999V/99.99V/750V(1.0%+3),9.999mV/99.99mV(1.0%+3) current:999.9mA/9.999A(1.0%+3),99.99A/999.9A(0.8%+3)AC current:999.9mA/9.999A(1.2%+3),99.99A/9999A(1.0%+3)Resistance:99.99(1.0%+3),999.9/9.999k/99.99k/999.9k(0.5%+3),9.999M(1.5%+3)Capacitance:9.999nF(5.0%+20),99.99nF/999.9nF/9.999F/99.99F/999.9F(2.0%+5),9.999mF(5.0%+5)Frequency:99.99Hz/999.9Hz/9.999kHz/99.99kHz/999.9kHz/9.999MHz (0.1% + 2)Duty Cycle:1%-99% ( 0.1%+2)Power:2 x 1.5V AAA (Not included)