Features:12V/24V automatically interchangeable by radio.All world frequency in unit; Aux-in.Standby current is 2mA,Long time no use will be no battery consumption.User can listen to music through car speaker; Can set up it at any place.Compact size and portable for your outdoor activities.Description AUX-IN Slot can set up it at any place suitable for excavator, tractor, truck, kart, loader,grader,earth moving machineand can be widely installed in: Sumitomo,Komatsu,Hitachi,Kato,Case,Sanyo,Kobelco and other famous band machines. thunder-proof ,aseismic and waterproof design, also have a higher resistance to vibration than other radios AM/FM brand but without CD due to dust problem, 12V/24V automatically interchangable by radio Worldwide frequency, just need to press some buttons to choose different countries' frequency for shipment(fixed frequency), it will be very easy to company purchase management, and we have got patent for this in China and Japan Specification Dimension : 18.5*8.5*5.5cm Output : 5W-28W (at your requirement) User can select Europe FM frequency or USA FM frequency through software, frequency also can be fixed User can listen to music through car speaker Standard din size with small body FM/AM rand , LCD display USA/EU function control by panel LCD display/real time clock Waterproof and dustproof front panel : waterproof test :JIS DO203RI standard Dustproof test : JIS DO207FI standard 12v/24v automatic interchange by radio Dielectric Strength Test Anti-seismic grade: Grade 13 (Japan JISD 1601 grades,67z ,70m/s2,6.8G) Advanced intemational level equipment and machiner Model No. KRH-KRH-HI-M99 Package Including: 1 X excavator radio