1A VARIETY OF PROTECTION FUNCTIONS: Voltage current signal generator output has short circuit protection, power supply has reverse protection, safe and reliable 2STABLE AND CONVENIENT: Voltage current signal generator adopt pluggable terminal, support easy installation, stable performance, easy to carry 33 POWER SUPPLY MODES: Handheld digital signal generator support 3 power supply modes, charging with mobile phone charger, power bank or external 24V can be charged 4FLEXIBLE AND ADJUSTABLE: The signal generator support one click switching of voltage and current adjustment. Independent cables are used to synchronize output. Support coarse and fine tuning two modes, adjust the number of turns can be set, easy to operate 5ACCURATE AND EFFICIENT: Analog simulator is equipped with 4 bit high light nixie tube, support high accuracy adjustment, and the output can be calibrated, so you can use with confidence 1 x Current Signal Generator 1 x USB Charging Cable 4 x Jack Test Crocodile Clip 4 x Insulated Jack Test Crocodile Clip Cover 1 x Screwdriver 6 x Terminal 1 x User Manual