We are traying to asses this product for a larger and wider distribution. So far it is a " no go" . The optic adjustments and menue is in Chinise, we need English, the operator manual is writen very sparsly, hard to follow, no response from manufacture regarding our concerns. the adjustmens rings are plastic and can not accomodate 30 or 40 mm scopes, we need our shop to make custom rings, the distance for optimal,clear viu to the scope is not define, we still are experimenting with this aspect. It is bussines of very poor service and communication.