Number of pieces:1 Assembly Required:Yes Material Type(s):Polycarbonate Welcome to my store, Hope you have a pleasant shopping trip! Features:It is a 4WD Robot Smart Car Chassis with Speed Encoder 4pcs Motor PCB Board.Specifications: 1>.Work voltage: 3-9V 2>.No-load current: 110-150mA 3>.No-load speed: 12510%-36510% 4>.Reduction ratio: 1:48 5>.Torque: 0.8Kg/cm 4>.Work Temperature: -25~85 4>.Work Humidity: 5%~95%RH 5>.Size: 146*94mmPackage List: 1>.1pcs Yellow PCB chassis 2>.4pcs Anti-interference carbon brush motor 3>.4pcs 34cm tire 4>.8pcs Motor mounting lock plate 5>.1pcs Battery box 6>.6pcs Longer screw 7>.2pcs Shorter screw 8>.8pcs Screw nutNotes:1. Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the pictures.2. Please allow 1-2cm slight dimension difference due to different manual measurement. About this item Four wheel drive power. Four DC deceleration motors. Carbon brush anti-interference motor. Thickened chassis. SHOP WITH CONFIDENCE: To provide you with the highest quality service, If you have any question, please feel free to contact us.We will provide after-sales service until you are satisfied. See more product details Four wheel drive power. Four DC deceleration motors. Carbon brush anti-interference motor. Thickened chassis. SHOP WITH CONFIDENCE: To provide you with the highest quality service, If you have any question, please feel free to contact us.We will provide after-sales service until you are satisfied.