I have the KV-2 vstank, which is one of the newer models. It has a working single headlight and the pair of tail lights (working only when the tank is moving (signals left, right and reverse).
The volume control is on the bottom of the tank, next to the off/on switch. Your tiger is one of the older model, and may not have this feature. The volume control has 3 settings: Loud, medium, and quiet (no canon or machine gun sounds).
I also picked up the sparkling leopard 2A5, which is a discontinued series. It uses a camera likeflash on the gun to simulate firing, but the gun does not recoil. Instead the whole tanks recoils. Its very similar to my Marui Leopard tank, which is an Airsoft. The Marui leopard is very cool, because after you fire a pellet, a panel on top of the turret, just behind the gun flips open to simulate the exhaust of the canon firing. I don't know if this happens on the real leopard tank, or if this is just a thing for the airsoft. My two airsoft Marui Abram doesn't have this feature.
I am very interested in getting the new proportional controls with the KV1 when it comes out. If it works as advertised, I'll probably get a couple more controller upgrade kits.

Warren