The light railway tracks contain an integrated metal insert to increase the contact pressure of the wheels on the rails. This ensures safe contact and high pulling force for jerk-free travel. The track oval has a space requirement of approx. 375 x 250 mm. To operate the railway, two 1.5 V AA batteries LR6/AA are required (not included) or a power supply with 3 V DC voltage. Since the locomotives have only minimal power consumption, the batteries or rechargeable batteries last a very long time."