Deezer company also introduced two subscription services—users paying €4.99 monthly received higher-quality music without ads, and users paying €9.99 monthly gained access to downloadable applications for computers, as well as Android, BlackBerry, and iOS mobile devices. In January 2010, the company's CEO and co-founder, Jonathan Benassaya, was replaced as CEO by Axel Dauchez, after fewer than 15,000 of Deezer's 12 million users signed up for its subscription services. In August 2010, mobile operator Orange partnered with Deezer in a deal to include free access to Deezer Premium, the highest tier of Deezer's streaming packages, with some of Orange's telecommunications contracts in
Tidal barrage pressure). When the water level outside of the basin or lagoon changes relative to the water level inside, the turbines are able to produce power. The basic elements of a barrage are caissons, embankments, sluices, turbines, and ship locks. Sluices, turbines, and ship locks are housed in caissons (very large concrete blocks). Embankments seal a basin where it is not sealed by caissons. The sluice gates applicable to tidal power are the flap gate, vertical rising gate, radial gate, and rising sector. Only a few such plants exist. The first was the Rance Tidal Power Station, on the Rance river,