... /carton , Gift boxWarranty12 monthsCertificates :If you order this type inverter, please leave me message(about input voltage, output voltage, ... output frequency and socket type.)1. Input voltage: DC 12V / 24V / 48V (optional),2. Output voltage: AC110V / 220V ... bacause our products boast of to-quality workmanship.In fact,they carry international quality approvals such as UL CE TUV ...