Very cool device (does not come with IR safety glasses BTW you will need some OD 5+ 900-1100nm IR protective laser safety goggles at a minimum before getting one of these, possibly a 2nd pair for showing the device to another person), output is definitely in the claimed range of 40W, and though this is the least powerful model available on this site it's not a "toy" by any stretch of the description, exceeding the class IV laser hazard threshold by 80x, capable of instantaneous ignition of wood <1 meter away, and burning various materials up to 3m as per my testing. Divergence is fairly rapid as there is no focusing lens in sacrifice of it's pocket sized design. The construction is of a sturdy 3d printed plastic that feels solid.
The device requires a small amount of assembly connecting the switch to the trigger and battery terminals to the main unit. Though I did apply some gorilla glue under the fan exhaust and the top of the hand grip to lock these parts together
Something not mentioned in the description is that the ON switch located at the traditional safety position of the hand grip has a 4 second long-press delay before the device becomes armed and is then operational by the trigger switch. (May save some headaches for someone thinking their unit was faulty ;) ) the voltage indicator lights and active cooling fan will turn on, and as claimed it does run whisper quiet. Same long-press to turn the device off.
Overall, cool gadget. Insanely dangerous. The next wasp that flies into my home is cooked.