There is a total of five devices in its  line-up, with prices depending, as you can probably guess, on the specifications and the amount of memory.  

Here's the line up from the most expensive to the cheapest.  We won't bother giving you the Euro and £ sterling prices because the exchange rates mean the differences are minimal compared to the dollar price. .  The marketing folk have been really imaginative though, with the names of the colour ways.

The Midnight Black, an 8+256GB phone costs $629, the Midnight Black/Silk White (8+128), cost $579, while Mirror Black, a 6+64GB device, costs $529. You can buy the “limited edition” Silk White with 128GB on June the 5th. In the UK, it's selling the products through O2, exclusively.

OnePlus claims that its Oxygen OS is more customisable than other phones on the Android bandwagon.

The phones have a 6.28-inch AMOLED 19:9 display. The phones use QCOM's Snapdragon 845 with a claimed performance delta of 30 percent and 10 percent more power efficient than its previous gen machines.

Its all glass Corning Gorilla design means that radio reception is better, claims OnePlus.

[Picture of four of the commonest silk moths, courtesy of Wikipedia and the Bibliographisches Institut in Leipzig]