AGPtEK Adjustable Armband for A02/ A20/ A01(S/T)/ A22/ A29/ C05/ M07/ C3 Bluetooth MP3 Player, Portable and Durable for Your Outdoor Sports, Black Adjustable Armband: it supports a wide range of arm girth from 11" (28cm) to 15.8" (40cm), perfected designed for your use Protects and stabilizes the device without slipping or constricting Not just for running: the stylish sport armband can be used for many different sports, gym and general activities Considerate design for your easy operation Warm Note: This Sport Armband is design for AGPTEK A02/ A20/ A01(S/T)/ A22/ A29/ C05/ M07/ C3 mp3 player and A06 / R06 mp3 Player only