Round ballast, special for spotlight, cars etc. Not enough space to fit normal ballast. Then it is your best choice. It is universal ballast, can be used for any type of HID bulbs like H1, H3, H7 etc.

Model Name: Round ballast
Dimensions: Weight:
Place of Origin: China
Price condition: FOB Guangzhou
Packing: White plain package or OEM package

Features:
1) High and reliable quality of ballast
2) Input voltage range: DC 9 - 16V
3) Rated voltage: 13.5V
4) Max. Start voltage: 23kV
5)Input current: 3.2A
6)Output power: 35W and 55W
7)Working temperature: -40 ~ 105
8)The ballast matches lamps as H1, H3, H4, H4 (H/L), H7, H8, H9, H10, H11, H13, 9004, 9005, 9006, 9007, 880, 881

The leave factory testing item of the product B0507:
1) 6 hours continuous working aging test.
2) Connection circuit protection test.
3) Short circuit protection test.
4) Lack of voltage protection test.
5) over voltage protection test.
6) Flash light concussion test.
7) Quakeproof capability test.
8) cold and warm boot test.
9) Polarity protection test.
10) EMC anti-jamming test