Roof lights for cars

Buy offer Details

Dear Sir/Madam,
Im looking for products with the following specifications :
Roof light for cars.
I need to be magnetic.
If possible, to be able to use it with batteries (if I dont have a socket) and electricity as well (normal socket).
I need to have more jacks, to plug in the place of lighter inside the car, or normal socket.
The shape to be like the one in the picture, but to be written on the front and back side with ,, SECURITY or ,, K9 UNIT.
Dimensions :
- Length 50 cm
-Width 10-15 cm
- Height 15-20
I am looking to buy only 10 pcs, for testing the quality and the response of the the market!
If quality is good and market response well, I am looking for long term business relationship.
Thank you!