Ritron Wireless Call Button,UHF RQA-451

Two-Way Radio Call Box, Band Type UHF, Material Polycarbonate, Channels 1, Output Watts 120 mW, Width (In.) 5 in, Height (In.) 7 3/5 in, Length (In.) 2 1/10 in, 77 Programmable Channels, 154, No External Channel Select, Battery (6) AA Alkaline Batteries, Provides Up To 7000 Transmissions, Operating Range 1/4 mi, Includes AA Battery Holder (Batteries Not Included), Internal Antenna, Radio Transmitter with Voice Storage Capability, Sealed Enclosure with Button, For Use With UHF Radios, Red