A:AnswerI do not think it is possible without any additional device. the technology of double audio output by Bluetooth is more recent to 2016, for example my Samsung S8 plus allows me to listen to the music in my headphones while it sounds in my Bose mini color speaker. at the same time
A:AnswerI play videogames in my Samsung s8 plus with these headphones and I do not perceive a considerable latency to consider it an inconvenience during the game .
I feel that it has latency I do not have the necessary devices to measure that very small difference
I personally do not perceive any significant latency
A:AnswerAs long as your tablet has Bluetooth enable you can use any wireless headphones. This particular headphones comes with a usb cable for you to charge it .