The Ario Covert is the most discreet 510 thread cart battery yet!  It looks like an e-cig and the high airflow allows you to hit it like an e-cig.  And although the design is buttonless, the charging port is the button!  So, tap the charging port like you would a touch screen to operate.  The Covert is loaded full of features your customers and patients will love:

 

510 thread fits all standard carts up to 2ml Variable power (low-med-high) Preheat mode Breath or button activated Magnetic base quickly detaches from battery