This is a 12V horn used as a suitable as a replacement for the standard horn found on Monkey and DAX bikes and will work with any bike with a 12V supply.
This is an after market product made to a good standard.
 It is E4 approved for road use and is loud.
Option Straight Bracket or Of 45 Degree
 Dimensions and Specifications:
E4/9 Model
- 12V
 - 1.5A
 - 100Db (LOUD)
 - E4 stamped
 - Black
 - Spade fitment for electrics
 - Depth 27mm
 - Diameter 66mm
 - Bracket has 2 M6 fixing holes.