Borogo Kayak Fishing Rod Holder, 2 Pack Kayak Deck Flush Mount Fishing Boat Rod Holders and Cap Cover for Kayak, Fishing Boat, Canoe and Fishing Tackle Accessory Tool auspowers_batchfour The envelope is made of

The envelope is made of semi-transparent plastic

Baomain Female Threaded Air Gas Water Non Return One Way Check Valve 3 / 8 PT

High quality louder speaker and electret microphone units provide clear audio communication

it is probably the speakers problem

24 Centimeters

Borogo Kayak Fishing Rod Holder, 2 Pack Kayak Deck Flush Mount Fishing Boat Rod Holders and Cap Cover for Kayak, Fishing Boat, Canoe and Fishing Tackle Accessory Tool auspowers_batchfour The envelope is made ofBorogo Kayak Fishing Rod Holder, 2 Pack Kayak Deck Flush Mount Fishing Boat Rod Holders and Cap Cover for Kayak, Fishing Boat, Canoe and Fishing Tackle Accessory Tool Features: This item includes the cap cover with a rubber base gasket. Light weight and portable to carry. 30 degree angle designed head. 3 fixing point for quick rod adjustment. It is easy to install on the kayak. Manufactured of ABS material for long life a handy and convenient