It either wont connect blue-tooth-wise . So if you wear socks with your slippers you may want a more enclosed shoe not the sandal, my foot does slip out easily if I have socks on. 5, but I don?t think you can plug one device in and draw all 4. Si tienes la aplicación atmos en xbox o pc se oye diferente con otro estilo al de DTS así puedes escuchar en el que mejor te sienta aprovechando los 2. 5 first but it was too big so I got the 6 and it was peeeeeeerfect! Wish the ones I got for replacement had that feature. Kind of like fingerprints, no two alike. Easy to adjust volume while wearing. It is large, but that kind of comes with the territory here. It looks so good on and I feel like it really slims my foot.