According to new AHA and American red cross guidelines, it has 10 scenarios to treat different cardiac arrest cases Stimulates completely the real AED with power and shock buttons LED can indicate the operating training process Trainer can be used with man body, and it can also test if the pads have been attached firmly or not We can set every language according to customer's demands Pause function, and you can adjust its voice volume To serve the teaching better, we add a voice output jug which can connect sound boxes About the packaging of this trainer, we plan to use the corrugated paper which is firm enough like mail box We can't preset English and Spanish at the same time, only one trainer with one language. On this point, we need a further research Specifications: Power supply: DC4.5V /3 x AA battery Product size: 127 x 127mm Maximum operation current: lower than 400mA Product content: Main body, pads, wire connectors, instruction manual, batteries and storage bag