Raymarine Dragonfly 7 Pro with US C Map Essentials A leap into the future of sonar Dragonfly 7 Pro employs true wide Spectrum CHIRP Technology where sonar signals are transmitted into the water allowing Dragonfly to interpret more detail target more fish and image structure with unmatched clarity CHIRP DownVision will change your underwater view with incredibly clear photo like sonar images that surpass ordinary imaging sonars with superior deep water performance to 600ft (180M) and reliable high speed bottom tracking Dragonfly 7 Pro has GPS built in and comes with c-map essentials by jeppesen for charts Dragonfly 7 Pro features built in Wi-Fi so anglers can stream Dragonfly sonar data right to their smartphone or tablet with the Raymarine Wi-Fish mobile app Dragonfly is engineered with optical bonding LCD display Technology that are all weather and deliver Brighter colors sharper contrast and are guaranteed to never fog up