Beaver Double Ended Stainless Steel Bolt Snap Size:115mm the M1 has the AFC

the M1 has the AFC automatic flow control

fits pocket

Waterproof 3D Mesh Vest -Product Sheet

AC Power Adapter: Input: 100-240 VAC 50-60 Hz

If you want to add a wireless transmitter it is best combined with a short high pressure hose like the 15cm Miflex HD hose to help tuck the transmitter out of harms way and you'll also need a high pressure swivel pin to make the hose and transmitter seal correctly

Beaver Double Ended Stainless Steel Bolt Snap Size:115mm the M1 has the AFCBeaver Double Ended Stainless Steel Bolt Snap a simple and effective design to help secure your diving equipment. Available in 3 sizes: 90mm 100mm 115mm