Check the listing for details. 80/40m QRP 6V6 CW Transmitter Battery Powered (2.6 watts RF output). Condition: Open box. Listed at 167.00 USD. QRP transmitter, with a dc to ac inverter circuit for a power supply, rectified and filtered to produce about 240 volts dc, no load. No ac power cord necessary! This is similar to the same transmitter that I have on another listing, but this one has plug-in coils in lieu of micro-inductors for the transmitter Pi-Network tank circuit. It also has an additional socket for the FT-243 or FT-241 crystals. Please see all photos. Batteries are not included, but you can find them easily on eBay, along with the charger (26650 lithium-ion types required). The chassis is a 3D print, antique brass in color, similar to plastic. I get about 2.5 to 2.7 watts RF output on 80 meters, and a little less on 40. It will run for several hours before needing to recharge the batteries, depending on the capacity of batteries used. You can also pull the batteries and use an external 9 volt dc supply, capable of about 2.5 to 3 amps current drain. Binding post terminals are on the back of the chassis for the external power supply. Want to double the power out? Simply install a 12V6 tube in the socket, in lieu of the 6V6, and use a 12 volt, 3 amp external power supply (or battery). I can get almost 7 watts output with this method. Nothing to change except the tube and power source. There are no plug-in coils, simply because the Pi-Network uses micro-inductors, in lieu of a wound coil (located inside the crystal/inductor plug that you see, with the green cap. I will ship your transmitter with this plug-in accessory, one each for 80 and 40 meter operation, using HC-49/U crystals. This can also work for 160 and 30 meters, for an additional cost of $14.00 per plug-in accessory. All I have for 160 meters are the 1843 khz QRP crystals. Many frequencies available for other bands. Even though it is battery powered, you will still need to use the same safety precautions afforded any electronic equipment with high voltage. The power circuits inside the chassis can be quite LETHAL, if you do not handle it with proper respect! A hand-sketched diagram of the full circuit will be provided to the purchaser of this item, along with a locator drawing for the controls and connectors. I guarantee this rig will work if hooked up properly. Batteries or other power sources are NOT included in this listing. SHIPPING TO THE UNITED STATES ONLY.