Description: It is suitable for DIY upgrade and modification of vehicles, ships and tanks. Made of plastic material, strong and durable. 2.4G technology, strong anti-interference ability. Customers need to bring their own 4 AA batteries. Out-of-control protection function, to avoid loss due to out-of-control, please refer to the instruction manual for specific setting method. Specification: Material:Plastic Type:Receiver andamp; Transmitter Set Age Level:17 Years andamp; Up Size Chart: Remote Control: 113x70x190mm/4.4x2.8x7.5inch Receiver: 32x18mm/1.3x0.7inch Package Includes: A: 1 Piece Remote Control and 1 Piece (3and1 Channel Signal) Receiver and 1 Piece Frequency Line and 1 Piece Manual B: 1 Piece Remote control and 1 Piece (3and1 channel signal) Receiver and 1 Piece Lithium Battery and 1 Piece Frequency Cable and 1 Piece Manual C: 1 Piece B4 Remote Control and 1 Piece 160A ESC and 1 Piece (3 and 1 channel signal) Receiver and 1 Piece Frequency Line and 1 Piece Manual D: 1 Piece Receiver (3and1 channel signal) Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! 3. Wish you a wonderful on-line shopping! Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.