Boost Dual USB travel charger adapter with Micro USB cable has been made to supply a maximum of shared 2.4A current to your units. 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 l 2W. 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.