Randy's Auqa Top 2 uses dual quartz heating elements with a water bubbler attached. This makes for a perfect travel water cooled hit, or a great at home unit. The device will fit 510 thread connections, the built on beauty ring may require you use a stick style battery.
Features Water Bubbler Attachment Dual Quartz Coil
Hands down worth the money I spent, be careful they are fragile… but work great and taste better than others I’ve tried so far around the same price and availability.
This thing is fantastic. The battery is plenty powerful enoug. it cools evenly. The battery will last at least 10 dabs with preheating and everything probably more. I highly recommend this.