XS Scuba Over Pressure Valve (OPV) Complete Assembly Size:1 This HR monitor is also

This HR monitor is also 30m/100ft water resistant

Compression molded light-weight stress resistant outer shell

for the incorporation of basic accessories

The compass is available in wrist

streamlined way to carry a pony cylinder on your back

XS Scuba Over Pressure Valve (OPV) Complete Assembly Size:1 This HR monitor is alsoXS Scuba Over Pressure Valve is a great save a dive kit item that will help you prevent the rupture of your lift bag or BCD. XS Scuba Over Pressure Valve is designed to help you prevent the rupture of your lift bag or BCD in case they get over inflated. The valve works by automatically compressing the valve spring and relieving the pressure. The durable construction and the use of non corrosive plastic ensure that the OPV will withstand a lot of wear