BASE RADIO UNIT. VOLTS: 100-120/220-240. 50-60HZ. AMP: 1.0/0.5. Send us a message. INTERMEC TECHNOLOGIES CORPORATION MODEL 9181 ANTENNA. BASE RADIO UNIT. VOLTS: 100-120/220-240. 50-60HZ. AMP: 1.0/0.5. Designated trademarks, brand names and brands appearing herein are the property of their respective owners. Please do not hesitate to reach out if you have additional questions regarding an item before purchasing. SIGMA Surplus is a division of SIGMA Group. We stock a wide variety of items ranging from small parts to complete machines. We appreciate your business!