The GSM G-Power SL is a version of the GSM G-Power which includes a headset instead of the normal speaker. This unit has all the same features as the GSM G-Power, including: range of operation, excellent autonomy, speaker/s audio and volume adjustment, main unit surface treatment, but also includes a twin speaker headset. This unit can be used under a hood or with the Ocean REEF Diving Helmet H08. The headset, made with 2 special speakers, is connected to the main unit by a cable and a waterproof rubber connector. The main unit can be attached to the BCD jacket shoulder by using the included and incorporated stainless steel clip. The underwater rubber connection makes it possible to disconnect the unit from the headset/mask system during a dive. This unit is especially recommended for divers working in loud environments or for those wearing a hood or the helmet H08.