Compatible with MP3 Player, Cellphone, GPS and other Device Dimension with (140x75 mm) * EVA plastic products, plastic materials is a new environmentally friendly plastic packaging materials * With good cushioning, shock, heat, moisture, corrosion resistant laboratory science, etc., with non-toxic, non-absorben * Durable Hard Shell design to protect your Device or Headset for from everyday dust, moisture, finger , Water oil prints * Removable Belt clip hook to attach to your bag for easy storage and carrying, PERFECT unit for campers, travelers, gadget enthusiasts, hikers, and power hungry consumers.