Realistic PRO-56 8- Channel Scanning Receiver- New in box.Requires one crystal for each channel(not included) and 9V alkaline battery or AC or DC adapter(none of which are included). Individual LED channel indicators and lockouts. Interchangeability - put any channel on any band. Two-second scan delay lets you hear the return calls. Swivel mounted telescoping antenna. Built-in speaker. 1/8" headphone jack. Squelch silences noise between messages. Automatically scans these frequencies for active channels: VHF HAM 144 - 148 MHz, VHF 148 - 174 MHz, UHF LO 450 - 470 MHz, and UHF Hi ("t-band") 470 - 512 MHz. Listen to the action in your area from the comfort of home.