- Travel friendly – the lightest CCR in the world – just 5 kg!
- Compact – the smallest CCR in the world – just the size of 2L tank!mCCR with 1.9 kg of the scrubber!
- Multifunctional - from Rec to the top SpeleoDiving expeditions!
- Sidemount – the most flexible tool for any kind of diving and emergencies!

- Rec diving – one tank plus s7 on the side with 1L O2 on the unit
- Twins diving – s7 on the side with 2L O2 on the unit
- Sidemount Diving – SM tanks and 2L O2 tank on the butt or 3L tank as stage
- Toddy Style SM Diving – 2-3L Diluent and O2 tanks are on the backplate
- Bailout CCR diving - any configuration with s7 as bailout CCR
- Dual CCR diving – two s7 CCRs
- Serious deep diving - s7 as Oxygen CCR
- Sump diving – s7 as a game changer
- Speleo diving – difficult logistics is not so difficult with s7

- exhaled gas goes to the single counterlung
- diluent and O2 are added by diver through MAV to the counterlung
- gas goes through the scrubber, mixing
- CO2 removes in the scrubbercells measure the ppO2 level which is shown on the monitor
- gas goes to the DSV to be inhaled

The counterlung has:- dump valve allows automatic or manual removal of gas from the counterlung- anti-collaps system allows preventing the collapse of the counterlung- water trap space prevents water from coming to the scrubber to dissolve the absorbent
- capacity of the counterlung – 5L- volume of the water trap – 1 L- counterlung is designed to collect water in the lowest place - OPV valve - to remove water quickly- "motorcycle" fabric protection. Soft and robust
The position of the counterlung on the body is between the classical chestmount and sidemount, close to the body. It gives a diver a fantastic WOB in any body position

- perfect WOB in all possible positions of the body
- control the volume of gas inside more efficiently
- no mount of the unit to pass restrictions
- possibility to give the unit to a buddy in an emergency case
- possibility to take off and leave the unit in a cave in case of a total flood in an emergency case

- s7 works perfectly with one tank or a double tank in Backmount
- It is reasonable to keep a 1-2L O2 tank on the body of the unit

- Axial scrubber - the simplest type of scrubbers. No orings – more reliable!
- capacity of the scrubber - 1.9 kg
- time of breathing – up to 4 hours, depending on the condition of diving. In cold water lower 6 degrees, a neoprene sleeve helps to keep the efficiency of the absorbent. s7 is short, and the temperature of the gas drops less than in ”big and long” units!
- difficult speleo logistics? Put 1 kg of absorbent for up to 2 hours of diving to reduce the weight of the CCR

Manual Addition Valve:- supplies diluent and O2 to the looporifice or needle valve is inside- orifice supply 1L O2 per minuteneedle valve has an adjustable tension of the rotation of the valve
O2 MAVmaintains breathable oxygen levelscompensates for metabolic oxygen consumption
Diluent MAVreduces PO₂ if too highmaintains loop volume during descentflushes the loopprovides breathable gas in emergencies

To connect off-board gas, any type of connector (inflator type, omnisviwel etc) can be used. 
It is recommended to use Swagelock QC4 for Oxygen and QC6 for Diluent:- one type of connector, but with different diameters. The same muscle memory, but no possibility of making a fatal mistake and connecting the wrong gas- big connectors – easy work even with thick gloves- minimum water goes inside when the connection does underwater – minimum risk of water with salt or sediment going inside of MAV to damage it

s7 has one AK4 femail pin connector and one blind port to connect one more AK4.
Shearwater, OSTC or any other computers with AK4 male cables are compatible.
The second AK4 port can be used for HUD or the second monitor, Shearwater NERD or a transmeter of a wireless computer and HUD

s7 uses coaxial connectors on the cellsThey provide a firm connection and high reliability in wet conditions
Any cells (galvanic or solid state) with a coax connector compatible with a monitor can be used. It should be three cells R22SMB type
Connect the calibration cover to the head and save Oxygen when calibrating. "Fild" method is also good 

- the handle to carry the unit- upper boltsnap for vertical transportation