We value all of our customers, and appreciate any feedback that you care to give us related to this website, or our products or services. We maintain a philosophy of continual improvement in all that we do. Speed-O-Tach, Inc. Auto Radio & Electronics Corporate Office 4090 Pike Lane Concord, CA 94520-1227 Toll Free: 1-800-442-4491 Tel: 925-691-4090 Fax: 925-691-4101 Business Hours: 8-5 p.m. Pacific Standard Time Monday - Friday Email: