Twinkly Strings USB-C Heart 200 LED, Heart-Shaped LED Light String, Christmas Lights, RGB Multicolor LED Lights, Mappable LEDs, Compatible with Alexa, Google Home, USB-C Power, Green Wire, 12m

Well made lights.. need a phone (USB) charger to work but one of the better products sold by Twinkly. Sturdy cable. Bright lights and controllable via the app.

They worked well at Christmas and I ran them if a battery pack and they worked fine. They used a bit more battery than I expected but got three or four days out of a small usb c battery pack I use for charging my phone (charges that 1.5 to 2 times)

I've got to say I'm really not loving these so far. I've got several sets of Twinkly lights that we decorate the front of the house with at Christmas and they're absolutely fantastic. Expensive but genuinely worth it for the effects they give. I saw these and, as we were on the look out for some small lights to add to a bedroom, thought they'd do the trick nicely. They work fine, although they're probably a bit smaller than I was expecting, but as of right now the integration with Alexa is completely broken. No matter what I do I'm getting either "device is unresponsive" or "server is unresponsive" when adding them. I've completely removed the Twinkly skill, updated everything, re-added the device etc and still I get the same issue. Everything else in our extremely smart house is working without issue. They work fine in the Twinly app, but I just can't group them with anything else in Alexa unfortunately. UPDATE Unfortunately I've had to return them as they started crashing randomly. The only way to get them to turn back on was to power cycle them. Clearly something intrinsically wrong with them. Reduced my rating by another star accordingly.