9 ft. 36-Light Battery Operated LED White Ultra Thin Wire (Bundle of 2)

Not sure but the battery box fits AAA battery. The total size of battery box could be 3 inches and 6 inches of lights.

Yes, they do twinkle.

My battery box is 3 3/8" L. x 1 7/8" W. x 13/16" D.

BIG, FAT, YES!!!! YES they can be used out doors! We string 20 strands onto our Dodge Nitro for 2 months. It rains and they continue to work. The strand itself can be fully emerged into water and still work. The battery pack itself however is what is NOT water-proof. You MUST find a way to safe guard the battery pack. On our vehicle we tie the battery packs inside, and then the strand leads outdoors into the curves of the Nitro. I have been using wire, zip ties, string, and hot glue to affix them to auto body, auto plastic trim, and glass for 10 years. Some strands last for several years. Some strands get water in them because I played chance with them, got them wet and they shorted out lol. Some times the back of a light will rust burning it out. I just replace whatever strand doesn’t work each year. Last year 2 lights burnt out on 2 strands. So 18 out of 20 strands made it through severe rain storms for 2 months. It’s up to you. Just protect the battery pack. Best of luck ^^,

The wire is black.

battery box black small enough we zip lock on wheel

Yes, but only if you're handy with a soldering iron and good at working with relatively thin magnet wire (i.e. scraping off or otherwise removing the enamel insulation- don't count on it being solder-through.). All the LEDs are in parallel, which means they all have to work on the same voltage. Originally the red and amber were direct color, which work on a lower voltage. To make these strings happen they're using phoshor converted Amber, Red and possibly green as well. These are based on a blue chip which tend to be close to 3 volts. And the white and blue have always been that type of LED. Therefore it would be possible to "cut and paste" pieces of multiple strings together to your heart's content, limited only by the need to keep an electrically reasonable length (9 feet seems to be good), your soldering skills and tolerance for annoyance! Of course correct polarity must be maintained or the wrong part of the string won't light up. But at 4.5 volts at least this won't damage the LEDs- just hook it up the other way so it works and you'll be fine.

Sorry, I missed this update question. It's somewhere around 11 pulses per minute, YMMV.

The pulsing is at about 0.18 Hz (at least in my copy). That's a period of about 5.5 seconds per pulse. If you're asking about the frequency of the PWM used to dim the LEDs during the pulsing, it's pretty slow, I can't measure it right now but is likely in the range of 40~100Hz.

Hi ddnewyork, this Battery Operated LED Red Ultra Slim Wire is an online exclusive item as there is no listed store SKU. It can be shipped to you directly or if it is eligible, shipped to a Home Depot store. We appreciate your business and look forward to serving you in the future. Thank you for shopping Home Depot!