Thanks to Anny our rep from GearBest.com, I have the black HotCig R150 TC mod to review, which was sent to me free for that purpose, it also comes in a silver version. Also sent with the R150 to review, was the matching Hotcig Drip Tip which also comes in a wider version Here As always this review will be my honest, unbiased, opinion of these items. UNBOXING: The package from GearBest, was sent using FedEx express shipping. Despite the adequate packing & bubble wrap used by GearBest, FedEx thought it would be a good idea to play football with my parcel & while the mod & DripTip themselves were fine, their containing packaging was not. First the Drip Tip, this comes in a fancy glass vial, with some shredded bamboo (at least I think that is what it is) packing inside it, to prevent the DT moving around & smashing the glass, it is then capped with a cork stopper. Unfortunately, I can not show you a photo of this, due to FedEx's rough handling of my package, so instead here is a picture copied from the GearBest product page: Here is the condition the one I received arrived in, as you can see GearBest had wrapped this in 3 layers of protective foam, which should have been good enough under normal transporting conditions: Next the R150 Mod, again, GearBest had protected this, using sufficient bubble wrap protection for normal transportation conditions, the fault is not GearBest's for the condition that these items arrived in. I place the blame squarely on FedEx's shoulders for the rough handling during transport, no package can be bubble wrapped enough for if the transport company workers decide to play football with your package. The R150 Mod comes in a rather unique wood (possibly bamboo or balsa) gift box, this would make a nice decorative box for storing small parts or something, if you wanted to & if yours arrives in better condition than the one FedEx delivered: (click on all the following photos to view in full size) Credit goes to Hotcig, that the mod itself survived & was undamaged, the way it was packed inside the box ensured that rough handling during transport did not see it arrive DOA. I am also confident, the material (wood) of the box itself probably played a part in protecting the mod, a cardboard or plastic box may not have fared so well. Yes that is glass from the Drip Tip vial, inside the mod's box. After cleaning the loose glass & other debris, the contents inside the box could be finally revealed. Inside you will find the R150 mod, a warranty card, a user manual & a rather nice braided, gold flecked USB cable - the picture does not do the cable justice, it is one of the classiest looking USB cables I have seen. The Abalone shell on the sides of this mod & on the matching Drip Tip just ooze class! For the price this pairing can be picked up for (under $100Au, on sale), it is a a steal, this device looks every bit as good as, some far more expensive, high end mods. IN USE: The R150 boasts a waterproof chip but Hotcig warn not to use the mod when wet. Unlike mods that have a waterproof housing, the R150's chip (I suspect the entire PCB) is waterproof, which means if it gets wet, it is not going to hurt the electronics on the main chip board but this does not mean it won't cause problems if the mod is wet & you try to use it. Photo taken By HotCig during their own testing For example, water in the battery compartment is likely to cause a short circuit between the batteries, this could be very dangerous. What this feature does though, is it ensures that should ejuice get onto the chip, from a leaky atomiser etc, then the mod is going to continue to function fine. Ejuice on electronics is not a good combination, just like other electronic devices & any liquids, they don't mix & will likely damage your device. With this waterproofing feature, Hotcig engineers have put some thought into protecting the device from the possibility of leaking ejuice. The R150 has a Wattage mode, Ni, Ti, SS & Ww Temp Control modes. Exactly what Ww mode is, is not explained in the user manual or on the Hotcig site, some other experienced users have speculated that this is a Tungsten TC mode, for use with ceramic coated Tungsten coils. When you get the mod & install batteries, it will be in Wattage mode, which has a range from 1W up to 150W. This is the mode the majority of testing was done in & in this mode it functions like many other VW devices, if you hold either of the up/down buttons the wattage increases in 0.1 increments & scrolls very fast, much faster than practical for general use. The best way to adjust the wattage is to scroll close to your desired setting then click the up or down button several times to dial it in. Holding both the up & down button at the same time will lock the wattage, so when you accidentally click the up or down button, the wattage will not change when locked. The instructions in the manual are not very clear (throughout in fact), on how to get into the TC modes but you need to lock the wattage, then hold the up botton for a few seconds, then rapidly click the up button & you will see the different modes come up on the screen, when you see the TC mode or Wattage (Power) mode you want, click the fire button & the device will be in that mode. This will be confirmed when you look at the screen, as you will now have either a wattage display or a temperature display, with the mode the device is in lit up below that. With the limited amount of testing done in SS TC mode, the TC function seemed to be working fine. When you enter a TC mode the temp will be in degrees F ranging from 200F - 600F, if you hold the + or - button to scroll past those temp limits, it will jump into degrees C, with a range from 100C to 300C. To change the wattage for your TC mode, you will need to go back into power mode & make the adjustment, so it is best to set this before going into the TC mode you want. Once in TC mode, you can hold the + & - buttons to lock the temperature, so you won't accidentally bump those buttons & change the temperature setting. This mod does have upgradeable firmware & there is a firmware update for it but I was unable after an hour or more of trying to update the firmware. Not that I needed a firmware upgrade, the mod is working fine for me just how it is but I wanted to see how difficult it was to upgrade. I tried to follow all the steps correctly, several times but I was unable to uncompress the .DFU file. Maybe this needs a Mac to work, I really don't know but I don't see a problem with the firmware it has, rather than brick the mod I gave up. The 510 connection has a gold plated positive pin, which is spring loaded, with stainless steel negative threads. It is mounted flush to the top of the mod, so all your toppers are going to sit flush on the mod. The placement is centered between the left & right sides & an equal distance from the screen's side. The maximum size atomiser that I would use on it is 25mm diameter, which will be flush to the sides of the mod but because the edges of the mod are rounded, it will have a small gap between the mod & the tank, you won't have this problem with 22mm atties & with 23mm atties you almost do not see a gap. However, using the Limitless Plus with it's 25mm diameter on top of this mod does not look out of place at all, the sides of the mod line up with the outer of the RDTA, the small gap where they meet is barely noticeable. When you first put a new atomiser onto the mod & try to fire the device it will ask you if it is a new or old coil. This is great if you are using TC modes, though it isn't needed for using the mod in Power mode but it isn't a big deal, just press the up or down button & then the device will fire. If you don't click up or down buttons, you will not be able to vape until you do.