Boost Dual USB wall charger adapter with Micro USB cable has been made to supply a maximum of shared 2.4A current to your devices. That way, you are guaranteed a fast charge, no matter which port you use. Boost travel charger allows you to charge your devices while keeping a maximum power output of 12W. That allows for the optimum charging of any and all devices you connect to the charger while also giving you less risk of electrical damage to connected devices