Grounding Sheet for All Mattress Sizes, with grounding Cord and Test Pen (Soft Gray, 105 * 23inch)

["【 Instructions for Using Conductive Test Pen 】 The test pen is only used to test whether the product contains silver fibers. Even without connecting the ground wire, the tail light of the test pen will light up, proving that our product contains silver fibers!","【Suitable for various mattress sizes】The length of grounding sheets has been extended to 105 inches, ensuring perfect matching with mattresses of various sizes, allowing you to always enjoy the grounding connection.","【Simple & Secure Setup】Setting up the grounding sheets is easy; users can snap one end of the grounding cord onto the sheet and plug the other end into the ground port of a wall outlet."]