also you must make sure they are all the way down in the pouch to ensure they are in sleep mode. I will stop ordering them until they improve their quality control. He decidido cambiar mi reseña, estoy muy triste con mi producto, a pesar de haber tenido un buen sonido, no han pasado ni 2 meses y ya no sirve, lo compré para un viaje a la playa, al tercer día dejó de funcionar sin más, se terminó la pila y nunca volvió a encender (si, obviamente la cargue), pero lo más triste es que estaba dentro de mi bolsa bajo la sombra y sobre un camastro, es decir, no le dió el sol, no le entró arena y no se mojó a pesar de ser "contra agua" lo cual nunca pude comprobar, Installation on the bike was fast and simple. He said they stay on during his work out even while hes sweating. Very disappointed in Amazon for allowing this to happen. I just got these slippers in the mail today and I slid them on my feet. I’ve been searching for an 3 in 1 charging Stand. That said, theyre not perfect: the soles get really slippery when wet (but they tend to dry fast), the tread will wear to a flat surface in just a couple weeks, and the soft material of the soles wears thin fairly quickly - 5 or 6 months of heavy use seems to be their lifespan. My mom bought these for me for Christmas when I noticed they had reduced in price by $70 (I paid $170).