New RDX 2 Watt Business Walkie-Talkies replace and work with XU models. 30% louder audio to hear in noisy workplaces. Speaker has low magnetic field to greatly reduce attraction of metal shavings. 89 business frequencies to prevent eavesdropping and interference from inexpensive FRS/GMRS models. RDU2080d displays battery life and name of user and different work groups. Covers up to 250,000 sq ft and 20 floors. Includes Li-Ion battery for up to 12 hours use, belt clip, charger. 4.5"H, 8.6 oz. New RDX 4 Watt Business Walkie-Talkies replace and work with AXU models. Same features as 2 watt models above. Also programmable to work with other models, brands, base stations and repeaters. RDU4160d displays battery life and name of user and different work groups. Covers up to 300,000 sq ft and 30 floors. Includes Li-Ion battery for up to 18 hours use, belt clip, charger. 4.5"H, 10.3 oz.