Features:*Easy on-off mounting*Integrated bike mount*6 different sound effects when press the power switch*100db loud electronic signal penetrates traffic noise*Lightweight and impact resistant*Weather resistant*Control cable length: 20cm*Powered by 1*6F22 9V battery (included)*Dimensions: 3.43 in x 2.20 in x 2.20 in (8.7 cm x 5.6 cm x 5.6 cm)*Weight: 4.27 oz (121 g)Package included:1 X 6 Alarm Sound Bicycle Horn with Mount （battery included)