Save your money. The "solar panel" is totally useless, can't keep the rechargeable batteries charged. No way to charge the batteries due to the stupid connector on it so had to source replacement ones (twice now) in under 2 years. Now the inside unite just has the outside temperature at 70° constantly. Would not purchase again. Tried full resetting but doesn't do anything. Contacted support who just didn't understand. They wanted me to send a video of it not working.