1. Dual Channel VI Curve Tester: Experience precision with our dual channel VI curve tester, featuring adjustable 18-stage frequency and 9-stage internal resistance. It supports A or A+B channel display and offers a 5V trigger output for versatile testing needs. 2. Handheld Portable VI Curve Tester : This handheld portable VI curve tester is perfect for on-the-go circuit board analysis. It includes a built-in 3000mAh lithium battery and charges via a convenient TYPE-C interface for extended use. 3. Circuit Board On-Line Tester: Optimize your testing with our circuit board on-line tester, equipped with a 2.0-inch TFT color screen for clear display. The B channel position is adjustable, enhancing the flexibility and accuracy of your diagnostics. 4. Circuit Board VI Curve Tester: efficient circuit testing with our circuit board VI curve tester, which automatically powers off after 15 minutes of inactivity to save energy. It supports dual-channel signal input for comprehensive board analysis. 5. VI Curve Tester for Circuit Boards: This VI curve tester for circuit boards supports adjustable channel settings and features a 5V trigger signal output. Its compact design and high-capacity battery ideal for both fieldwork and lab use. Dual Channel VI Curve Tester 18 Gear Frequency Adjustable Handheld Portable VI Curve Tester Dual-channel VI Curve Tester with 2.0inch Screen 3000mAh Circuit Board Online Detection Tester ASA Tester High safety: ASA testing does not require the circuit board to be powered on; ASA testing does not involve circuit principles and does not require the circuit to be in working condition Strong adaptability: ASA testing does not involve the functions of components on the circuit board, so no matter what type of components the circuit is composed of, including digital, analog, mixed digital and analog, etc., it can be tested. Voltage: 4V Internal resistance: 50R, 500R, 1K, 2K, 3K, 4K, 5K, 6K, 7K adjustable Frequency: 20Hz, 100Hz, 500Hz, 1kHz, 2kHz, 3kHz, 4kHz, 5kHz, 6kHz, 7kHz, 8kHz, 9kHz, 10kHz, 11kHz, 12kHz, 13kHz, 14kHz, 15kHz adjustable Battery capacity: 3000mah Product size: 5.51x3.15x1.57inch Note: 1. The blue terminal is a multiplexed port. When the A channel is the default, the blue terminal outputs a 5V pulse voltage with an interval of 1 second. After the A+B channel is turned on, the blue terminal becomes the B channel signal 2. It is forbidden to measure with electricity! Before using this product, the object to be measured needs to be discharged first Color: As Shown Material: Plastic+Metal Package Contents: 1 * VI Curve Tester 1 Pair * Test Leads 1 Pair * Test Clips 1 * Type-C Charging Cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.