Specification:
- Displacement(mm / in.): 7.7kg surface, 7.95 kg submerged 
- Length(mm/in.): 774mm  
- Height(mm/in.): 285mm 
- Beam(mm / in.): 290mm 
- Draft(mm / in.): 200mm 
- Propeller: 3 blades OD:40mm Pitch:41mm 
- Speed: 1.45knots(2.7km/h) surface, 1.08knots(2km/h) subme
- Operating Diving Depth(mm / in.): 5M
- Max. Diving Depth(mm / in.): 10M (mechanical limit)
- Propulsion Motor: 12V motor  

Discover the Silent World

The NEPTUNE SB-1 submarine is the 1st underwater R/C model by Thunder Tiger. Equipped with high technology operating equipment in the inner hull tub, covered by the brilliantly yellow color outer hull, the NEPTUNE SB-1 will let you enjoy the otherwise hidden, underwater world.
Adopting a static diving system, operating the Neptune is just like the real thing. The system is driven by a ballast tank with pump & motor unit. Start the pump to induct the water into the ballast tank. Control the amount of water in the ballast tank, the submarine can dive from the surface and stay underwater in static. Using the propulsion power unit and full elevator and rudder control, you can drive the submarine graceful sailing underwater. Install a digital camera (optional) and you can watch the amazing underwater scenes.

There are 2 versions of SB-1 Submarine, 5220-F is the super combo version. All the necessary operating equipment already be included in the box  and aslo fully assembly. Just open, then you can play this fantasy model immediatley. 

1) Radio Control model 2) High impact ABS plastic hull 3) 12V motor propulsion power unit 4) Dual Static & Dynamic Diving System 5) Ballast tank w/roll pump & motor drive system 6) Fully elevator/rudder control device 7) Auto-detect electronic protecting system 8) Video transport cable connector equipped 9) 12V Sealed Lead–Acid battery included

1) Neptune SB-1 Fully Assembly Model x 1
2) SeaCommanderT6M Radio x1
3) 12V Battery Charger x1
4) Assembly tool set x 1
5) Adjusting Weight Set x 1
6) Instruction Mnaual x 1
7) Parts Catalogue x 1