2 set Basic CB radio 27Mhz 150mW Education Unassembed Kit 9VDC [FK711] &lt;==Beware to Add To Cart !!! Only sold by Thaikits for product warrantee and free technical support==&gt; Require Power Supply 9VDC Current Consumption 35mA in receiver mode and 150mA in transmit mode Frequency by X-TAL 27Mhz / 150mW power / 50-150meter distance working PCB size 2.29" x 2.43" / @The speaker is not inclued because It is not allowed to ship by airplane