Sumec firman 2.9kva ecological generator with key starter eco3990es is an eco-friendly, low noise, low fuel consumption generator with an impressive operation time of about 12 hours on full fuel tank, two tires for easy mobility from place to place and a 12v long lasting battery for the key starting function. the firman eco3990es generator is designed with a separate 0.5l oil compartment and an oil alert system that turns off the generator when the oil level is low. its sturdy design structure is built to international standard, anti-rust and water resistant coated metals makes it suitable for all whether conditions. it comes with 100% full copper which is ideal for powering most of your home, office and outdoor appliances like freezers, fridges, pumping machines, 1hp air conditioner and a host of other appliances. it has a voltage regulator which offers more protection to your appliances. some notable features of this powerful set include: 100% copper. 2.9kva. battery. key and manual starter. ac output -220v 2.9kva max. / 2.7kva rated. dc output -none. phase no: single phase? please note- kindly be aware of the dangers of carbon monoxide during usage. do not use indoors. it is recommended that you do not use roadside oils to avoid sudden damage. be sure to always replace the oil in the oil compartment at least once a month and do make sure that the generator doesn’t run out of fuel frequently.