PLEASE NOTE THESE ARE EX DEMO ITEMS. this has had a full service, in new condition. 
your buying 2 Grabo PLUS Portable Cordless Vacuum Suction Cup For Smooth & Rough Surfaces With Pressure Gauge, this can lift up to 170kg glass, the PLUS model comes with a built-in vacuum pressure gauge. comes with a 14.8v Li-ion battery. Perfect for use on smooth & rough surfaces, even on rough paving slabs. Has a 2 hour Charge time and a Working time (Full Charge) of 1.5 Hours, working perfect, all ready for work. please note there is only one bag and one charger, both units have a battery.