This amplifier is built after some good thoughts considering its previous models, they even provided an aux switch with it and non of the sell know how that works, its tpa3116d2 2.1 as you can see in the pic there is an aux switch ((aux sw) at the back of the Bluetooth antenna/aux jack ) ig thats what it is because its only receiving audio via bt not from lime and ig thats where this (aux sw) comes in i wanna know that if you have to shorts short it for a sec with a momentary switch, or can i use a proper onn and off switch with this, i dont wanna take risk or mess with this cuz this parcel took forever to get to me (less than 3 month), if anyone knows this do lemme know. Every AliExpress sellers who is selling this literally knows nothing, also how much big capacitor should i use for its supply