We make products that are engineered on the inside for life on the outside. We do this, so our customers can make the most of the time they spend pursuing their passions. COMPATIBLE DEVICES: echo 100, 101, 150, 151, 151dv, 200, 201, 201dv, 300c, 301c, 301dv, 501c, 550c, 551c, 551dv, 500c.