This product is a current induction tool. It is made of a flame-retardant ABS shell and a copper coil with good conductivity. It is safe and durable, with excellent texture, which can meet your needs well. It is a very good AC current. The induction tool will serve you very well. Features -Color:Blue. -Material:ABS, Copper Coil. -Size: About9.60X8.80X2.70cm/3.77X3.46X1.06inch. -Inner diameter: 50/5. -Perforation: 38MM cable. -Rated voltage: AC0.66KV. -Frequency range: 20HZ-400HZ. -Working temperature: -40-+85. -The design is reasonable, sensitive and practical, with stable performance, and can be used for AC current signal sensing. -It is made with excellent craftsmanship, safe and practical, not easy to damage, it will be your good choice of induction tools. -The ABS flame-retardant case makes your use safer and can meet your needs well. -It is made of copper wire material with good conductivity to provide you with more sensitive signal sensing. -This is a very good current sensing tool, which will meet your needs very well.