The item was as described incl. 2 pieces AAA batery supplied. The opening for inserting the batteries, is self-explanatory. The lamp can be a little harder to open, but talks with each other and the tightness of the fit of the two parts. The assembly on the bike was super easy. She holds and can easily be quickly solved by the connector from the bracket without the bulb holder must be unscrewed. Who has concerns other road users to hide (it is really very bright), the lamp can also easily tend downwards, it is adjustable in the vertical.
From the pictures, and the product features ago I suspect the lamp is identical to the Smart RL321.
So far, full 5 stars for the product, great value for money.