Digital Voltage Signal Generator: Advanced 4-20mA/0-10V current transmitter with a high-definition 4-digit display and adjustable brightness levels (1-8) for clear visibility in varying lighting conditions, enabling accurate signal testing with confidence. Three power options: External DC 15-30V (compatible with PLC power sharing), USB DC5V connection to mobile power banks or computers, and a built-in rechargeable lithium battery (Type 1 model) for uninterrupted operation in the field. Professional field testing tool: Compact aluminum-knobbed housing (89 x 69 x 28 mm) designed for electrical maintenance professionals who require reliable on-site calibration and troubleshooting, improving efficiency and accuracy in complex electrical systems. Memory function for efficiency: Intelligent parameter storage lets you save preferred voltage and current values with a simple encoder click. Settings remain stored after restart, reducing repetitive adjustments during frequent tests. Key specs and use scenarios: 4-20mA/0-10V signal transmitter, compact robust construction, multi-source power options, and a memory feature for quick setup. Use scenarios: - On-site calibration of 4-20mA current loops in industrial control panels. - Troubleshooting sensors and transmitters during field service or commissioning. - Testing in locations with limited power by using the battery or USB power bank, or during mobile equipment setup.