[ SPECIFICATION ] Input: DC12V/24V; Output: 3V, 4.5V, 5V, 6V, 7.5V, 9V, 12V, Max 34W. 8 selected plugs are popular used in small electronics. With these 8 plugs, different voltages options and USB port, saving a lot of buying different car chargers/ car adapters for your devices | Powseed 34W Car Charger Multi-Voltage replacement in-car power adapter with USB Port is suitable be used in bus, SUV, Van, Car, Minibus, Truck, Boat, or Motorhome. Compatibel with Dash cam, Power bank, humidifier, Breast pump, Speakers Router Philips RCA DBPOWER Portable DVD Player, GPS, Portable lunch box, piano keyboards, external hard drives, portable nebulizer, RCA, Blu-ray, Sylvania , mini Fan , Air purifier, CCTV, air cooler, tire inflator, blower, Clore jumper battery etc. | Powseed 34W Car Lighter Adapter is compatible with Spectra S1, S2, S9-Plus double electric hospital grade breast pump, Zyllion shiatsu neck & back massager cushion seat chair pad ( ZMA-14 , ZMA-14-BK , ZMA14 ) , Snailax shiatsu massage car cushion seat chair pad ( SL-256 , SL256 , AL233 , AL-233 ) | [Choose Correct Voltage before Charging] Small electronics appliances don't have circuit protection, if choose a wrong voltage, the device might be damaged. It is important to choose a right voltage on the Car Vehicle Lighter Adapter before vharging. If your device use Alkaline battery AA or AAA , then each piece is 1.5V, 2 piece choose 3V, 3 piece choose 4.5V, 4 piece choose 6V, etc | [IMPORTANT] DC Plug Polarity: inner Positive(+), outer Negative(-). ⚠️ Some musical devices may require opposite polarity. ⚠️ | Package include: 1 x 34W Multi Tips Car Charger/ in car power cord charger, 8 x Tips, 1 x Iron Sheet