Just curious, how do you switch the stungun and the light?
It has a separate switch and a key to insert at the back end of the cylinder to activate the stun gun. The pic i posted is almost the same as the unit except for the yelloy rim. Actual unit also has a cover for the stun metal protrusion to make it look more like a flashlight. Key is integrated as a cover for the switches also. It's all black. Made in Japan.
Do they have separate switch?
One could easily mke a mistake and have himself stunned, well that's just me.
I suggest not to insert the key unless you are ready to use stun function.
How many lumen is the light and how many voltage is the stunner?
Light is not so bright, almost the same as your ordinary all purpose light. Stun is rated at 60,000V.
What kind of batteries do you use?
I think it uses 9V batt. Will confirm how many. The cylindrical body has recessed screws for sealing the internals.