How much does this cost to the nearest dollar?

KLLsmDesign 30W Alarm Siren,Dual Tone Outdoor Self Contained Electric Security Ring Siren with DC 1.1Ah 130db 8 X 5.5 X 9 Inch for Car Home Doorbell Security Protection System,White
How to use KLLsmDesign alarm siren Just send it power 6 to 12VDC, it will work. It should have a Steady Tone Wire or Warble Tone wire, There are three wires (white, yellow and red), Connect the white wire to the (-) and connect the red to (+) for warble sound or connect the yellow wit to (+) for steady sound. You can leave the unconnected wire as is but just make sure this unconnected wire will not touch and conducting metals.plus

Price is $29.00
Price: $28.99