142 Horn Large Sound Bicycle Horn Mountain Bike Electronic Bell

Specification：  

Power supply: 1 9V battery (including battery) 100 per box
Weight: Approximately 100G
Color: black
Application: about 2.2cm pipe diameter
Packing: color box
Size: 8.8*4.0*5.4, control line length about 20CM [color] black [suitable] about 2.2cm tube diameter [packaging] color box