Transistor Curve Tracer adapter XY Oscilloscopes 2 ranges Bias [Unassembled kit] Generate IV curve to 2 CH Analog or Digital Oscilloscope in x-y mode Ib = 0uA,24uA,48uA,72uA,96uA,120uA,144uA,168uA for small transistor / Ib = 0.0mA,0.32mA,0.64mA,0.96mA,1.28mA,1.6mA,1.92mA,2.24mA for power transitor Vce = +10V for NPN transistor and Vce = -10V for PNP transistor PCB size 9.0cm x 10.0cm Note : Thaikits is only copy right owner to sale this kit in Amazon.