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1. It can be used for all the countries? Yes, we have European plug and American plug. The voltage from 110V -230V can be charged. 2. Power Both the transmitter is powered by 4.2V inside Li battery, but the output is 12V, the receiver is powered by 4 pcs AA battery. 2. Control mode? This is a remote control fireworks firing system, the remote distance is 500M. | ||||||||
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