To use this effectively, you will need the AC power adapter. While most concentrates will vaporize with a FULL battery, you will discharge both batteries long before you finish the tray. Tweezers are required to get the tray into the trench without spillage, and even then it's tricky. You need a butane torch to clean the residue off the tray when you're done. Let's add this up. You spent $120 on the MFLB. Is it cheaper to get this Concentrate Tray for $18, plus $80 for the power adapter, plus ten bucks for a spare set of batteries (this is supposed to be portable, right?), plus $6 for a butane torch and another $6 for a can of gas to fill the torch. That adds up to an additional $120 to retrofit the MFLB, when you can buy a pen-style vape for around $80. This is a bit like upgrading a Model-T into a race car... you can blow a small fortune and it will still never perform like the newer, purpose-built hardware. But if, like me, you already owned the MFLB, the AC adapter, the whip mouthpiece, and extra batteries... then it's a huge bargain.

Product does exactly what it says. Comes with 2 trays, one for wax one for oil. Gives you a lot more use out of your mflb. Much easier way of smoking wax or oils as well. Only concern is the trays are about the size of a dime which there's nothing you could do about. It just the trays become very very hot so you have to be careful when fooling with it, other then that its definitely a must have to go along with your mflb.