MULTIPLE POWER SUPPLY METHODS: ---This signal generator has three power supply methods, DC15-30v external power supply, a micro USB universal interface, and a built-in lithium battery, very comprehensive, you can choose the suitable charging way according to your need, this signal generator has a built-in 1100mAn lithium battery ADJUSTABLE VOLTAGE CURRENT: ---Voltage output 0-10v adjustable, accuracy after calibration is 0.01v, and the current output is adjustable from 0-22mA, the accuracy is 0.01mA after calibration, the current sampling resistance is not more than 500 ohms PARAMETER SAVES: ---This product can save parameters, set a voltage and current value, click the encoder to save, restart display the saved value, no need to adjust the parameters every time you turn on the machine, a practical convenient tool for your need COMPACT SIZE: ---with the compact size and lightweight, it is convenient to carry at home or outside 2 TYPES COMPATIBLE: ---The current output of this product is compatible with 2/3/4 wire output, and also this product is compatible with active and passive type Specification color: as show 1.Product name: Signal generator 2.Material: ABS 3.Battery: Built in 1100mAn lithium battery 4.Battery voltage: 3.7V 5.Quantity: 1pc 6.Product size: 8.9*6.9*2.8cm/3.5*2.71*1.1 inch(L*W*H) 7.Weight: 120g/4.23oz Package included 1xSignal generator