Weight - 15-36kg / age- 4-12 years. Practical and easy to transport| this booster can be quickly installed in any vehicle.  the seat features ample armrests for added comfort and which allow for optimum installation using the vehicle’s safety belt.  the armrests facilitate correct placement of the vehicle’s safety belt when the child is seated.  Product Features: Height regulating device: VISTA incorporates a device that allows the height of the seat belt to be regulated so that it fits directly over the child’s shoulder.  Wide armrests: The armrests facilitate correct placement of the vehicle’s safety belt when the child is seated. Easy to remove cover . How To Use: Place the booster seat forward-facing in the back seat.  It's best to put it in the middle of the back seat where there is a lap and shoulder belt. Caution & warnings: The booster seat fits fully on  car's rear seat| and does not hang over the edge. The booster seat sits flat on your car's rear seat| and is not turned or tilted. Make sure the lap belt is low and tight across child's hips. Shoulder and lap belts should always lie flat| never twisted.