Description: It is suitable for DIY upgrade and modification of vehicles, ships and tanks. Made of high-quality 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 & Transmitter Set Age Level:17 Years & Up Size Chart: Remote Control: 113x70x190mm/4.4x2.8x7.5inch Receiver: 32x18mm/1.3x0.7inch Package Includes: A: 1 Piece Remote Control + 1 Piece (3+1 Channel Signal) Receiver + 1 Piece Frequency Line + 1 Piece Manual B: 1 Piece Remote control + 1 Piece (3+1 channel signal) Receiver + 1 Piece Lithium Battery + 1 Piece Frequency Cable + 1 Piece Manual C: 1 Piece B4 Remote Control + 1 Piece 160A ESC + 1 Piece (3 + 1 channel signal) Receiver + 1 Piece Frequency Line + 1 Piece Manual D: 1 Piece Receiver (3+1 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!