4These conditions may cause your wheelchair to rust. (Figure 2.2)2.10.5 Do not drive in a S curve, do doughnuts or make sudden turns.2.10.6 Do not take an escalator.2.11 Mobile Phones and Other Electric Equipment2.11.1 Do not use a mobile phone or other wireless communication deviceswhile driving. (See Section 3. EMI/RFI)2.11.2 Do not charge the mobile phone or other electric devices from yourwheelchair's batteries.2.12 Ramps, Inclines and Drops2.12.1 Do not drive onto a steep ramp. Refer to "Safe Slope" in Section 10.SPECIFICATIONS for your wheelchair's maximum climbing angle2.12.2 When climbing up to an inclined road, please set the speed higherthan the medium speed and drive carefully. (Figure 2.3)2.12.3 When going down an inclined road, set the speed to "1" and never usereverse.2.12.4 Do not drive on a road with many bumps and holes close to each other,such as potholes or washboard roads. (Figure 2.4)2.12.5 Do not make sudden turns when driving on gravel roads or ramps.2.12.6 The maximum obstacle climbing ability is 6 cm for the Blazer series.Exceeding this obstacle height will damage your wheelchair and voidyour warranty. (Figure 2.5)2.12.7 When negotiating an obstacle, please slow down. Put your seat intothe full upright position and approach it head on (perpendicular).2.12.8 Just before the obstacle, speed up until the entire wheelchair hasconquered the obstacle. Negotiating an obstacle at an angle maycause your wheelchair to tip over. Don't do it!2.12.9 When climbing down a curb, slow down just before you get to it andonly speed up after the entire wheelchair has lowered to the road.2.12.10 Again, descending obstacles should be done perpendicularly. (Figure2.6)