Service: I have had a need for V3... 1 order: I didn't see they asked me witch one, they send V1 2. order: I said I need V3 --> V3 was written on a sticker behind, on the front it was branded as V1 --> didnt work with 5V. Electrical diagram was not avaible. 3. order Isaid I need V3, only V3, branded on the front --> they send again V1 with a V3 sticker behind (V1 was covered by a Sticker)...! Now Ifound out how to connect with 12 V power supply--> I works, but that was not nice....