 They all have air conditioning, air suspension, CCTV, standard class 3+2 Chapman seating throughout, 28 computers, sliding plug doors, and rheostatic and air disc brakes, and now have regenerative capacity.As with all "Electrostar" units, they use insulated-gate bipolar transistor (IGBT) AC motor drives.They have Tightlock fully automatic couplers but are only interoperable within their own class with other Class 357 units.