Up to 4W Power (2W low power setting). Pre-Programmed to 10 Channel / Code Combinations. 38 Analog and 83 Digital Interference Eliminator Codes. Two Programmable Buttons. 22 Hours Battery Life. The RDU4100 is a member of the new RDX Series introduced by Motorola. This On-Site Two-Way business radio is a 4 Watt, 10 Channel unit that is affordable and easy to use.