01922333043 cell number Dapper BM9000-II POS printer has 50-80mm/s black print speed, 58mm max paper size, 8dots/mm and 384dots/line maximum resolution, 48mm maximum effective paper width, 40mm paper roll diameter, 0.05-0.10mm paper thickness, USB interface + serial + bluetooth connectivity, DC7.4V/1.5A rechargeable Li-ion battery, 0-50°C / 10%-80% operating temp / humidity, -20-60°C / 10%-90% storage temp / humidity, 105 x 75 x 37 mm dimension and 235 gm