Features: Support double channel signal input. Supports 4-speed adjustable frequency and 4-speed adjustable internal resistance. The position of route B can be adjusted. Support display of A or A+B channel. Support triggering signal output (5V). Specifications: Material: Plastic Size: approx. 140x80x40mm/5.51x3.15x1.57inch Model Name: 210S Curves Tester Voltage: AC2.7V Frequency: 40Hz, 350Hz, 2kHz, 14Hz adjustable Advantages: 1. High safety: ASA testing not require powering up the circuit board; ASA testing not involve circuit principles and not require the circuit to be in working condition 2. Strong adaptability: ASA testing not involve the functionality of devices on the circuit board, so regardless of the type of device the circuit is composition, including digital, analogs, mixed signal, etc., it can be tested. Note: The product is without build-in battery. To use the DC5.5x2.1 interfaces, DC24V 1A power adapter is requires for power supply (preparation by the user themselves). Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution. Package includes: 1Pc Curves Tester 1 Pair Probes 1 Pair Test Clip