Features: (1) Delicate printed coordinates for easy recognition and calculation. (2) Board body made by advanced POM material to avoid static electricity and frequency interference. (3) It accommodates all sizes of DIP IC and discrete components with diameters 0.65±0.1m/m, interconnect wires 20-28AWG(ø0.3-ø0.8mm). (4) Spring contact uses phosphor bronze/nickel-plated with highly elasticity and good conductive, can stand operation more than 10, 000 times. (5) Max. allowable voltage/current:48Volts/5Amps. (6) WBU-2xx Series is a valuable tool.No signal interference caused screen white dot. Suitable to design high level prototypes whether in R&D application or university laboratories.