How much does this cost to the nearest dollar?

LI LEAD Auto Starter 12V Car Battery Protector - Automatically Disconnect System For Car Battery Saver, Battery Voltage Disconnect Kit, Battery Buddy.
✫ WHAT IS THIS LIKE? LI LEAD Auto Starter is NOT a Jump Starter. It's a Battery Protector (Much safer than Jump Starter). This is a kit which is installed as interference between your car's electronic draw, and the battery. If you accidentally leave on something or if you have an electronic malfunction, the battery connection will be disconnected to save what charge is in the battery. This has two connectors, one for positive and one for negative. You only use one or the other. ✫ Easy Operation You can recover your battery by pressing the little button on the windshield(where you stuck it to), the battery will magically springs to life for

Price is $90.00

Price: $89.95