Zookr is really a cheating online site. I ordered 4 m2 bands under the offer of buy one get one free so i suppose to get 8 m3 smart band but i got only 4 m2 bands. After complaining and giving them opening video also that said it’s a right product what you got. It was like a joke to me. That did not return nor refund. They are 100% cheaters and just bluffs the costumers. I wish i did not have purchased anything from them. Highly not recommended.