100% brand new and high quality Features:It is focus on controlling the output loop current by controlling the electric field effect of the input loop.The input voltage of the control input terminal of the MOSFET is extremely small, so its input resistance is large.It uses most carriers to conduct electricity, so its temperature stability is better.The field effect tube has strong radiation resistance;Since it does not have shot noise caused by the electron diffusion of the disordered motion, the noise is low. Specification:Material: Electronic componentSize: app.1.5 x 3.5cm/0.59x 1.38inColor: BlackQuantity: 1 Set Note:No retail package.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package includes:5 x Field Effect Tube