These are a sampling of the various electronic pest repellers. When buying one make sure you check to see if the specific one is recommended for your specific pest problem. These are usually available on Ebay. From left to right: 1- Riddex, Global Instruments Ltd., Trenton, Mo. 64683. insect and rodent control. 2-Sunbeam, tele # 1-877-277-5832, electronic pest repeller SB101. 3-Transonic 100 by Weitech, inc. tele # 1-800-343-2659 electronic repeller.