Thank you for giving us the opportunity to earn your business. We are honored to provide the highest quality products! OEM! We manufacturer in the USA! We strive to provide every electrical professional with the most reliable continuity test phone set on the market. Made to last a lifetime of use. Give us a call for any questions or concerns and we promise to do our very best to assist you. If you work in the field of electrical or lineman, and want to know how our sets work, call us. If you want a tool to cut worktime and efforts, call us to find out how this tool does the job. We would love the opportunity to hear your feedback, answer any questions or explain how to use. Call, text, or email us anytime. Should you need a set repaired, we can take care of this for you. We answer after hours calls or text as well. Y hablamos español!