BW GasAlert Quattro Multi-Gas Detector QT-XWHM (lot of 5) W/ MultiCharger ??READ DESCRIPTION?? This listing is for 5 of these. One has a bad battery and there is a problem with the screen. Also included is a BW GasAlert 5 station multi-charger. Missing is the power cable. You will need to get a 6V power cable to use the charger. They all have heavy signs of use (scuffs, scratches,and dirt) THESE ARE BEING SOLD AS-IS! We are not the original owners of the units and we do not know their history. We are not accepting returns on this purchase. I powered up the 4 that work and they did their self test and seem to work. Since my knowledge of these is extremely limited, THESE ARE BEING SOLD AS-IS. We are being honest with you, so please only buy these if you know what you are dealing with. My knowledge is extremely limited on these. Once again, these are being sold AS-IS. NO RETURNS! Thanks for looking at our listing and supporting our small family business! SHELF: 8