Scuba Choice Scuba Diving Safety Tank Rattle Stick Signal Bell industrial EASY TO USE: The default

EASY TO USE: The default control command of 4 channel relay board is 1/2/3/4

which can be applied to connect different pneumatic components

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Scuba Choice Scuba Diving Safety Tank Rattle Stick Signal Bell industrial EASY TO USE: The defaultScuba Choice Scuba Diving Safety Tank Rattle Stick Signal Bell Available colors: Green and Orange. Cover included to prevent noises made when not in use. Rattle sound can be easily heard underwater. Perfect for getting your diving buddy's attention underwater. Rattle stick length: 4 3 4". Product Features Available colors: Green and Orange Cover included to prevent noises made when not in use Rattle sound can be easily heard underwater. Perfect for