MORSE CODE KEYER [ Assembled Kit ] free 9V battery holder &lt;==Beware to Add To Cart !!! Only sold by Thaikits for product warrantee and free technical support==&gt; Require Power supply : 9VDC / &lt;== Free 9V battery connector only sold by Thaikits ==&gt; Consumption : 35mA max. Adjust sound frequency with trimmer potentiomer PCB dimensions : 1.95 x 1.08 in. / @The speaker is not inclued because It is not allowed to ship by airplane