Compact and lightweight design: wireless fish finder weighs 230 g and measures 68 mm x 68 mm x 50 mm, making it easy to transport and store for your fishing trips. Fish location and water data at a glance: quickly identify where fish are swimming by providing essential readings such as water depth and temperature. Reliable sonar performance: 125 kHz frequency with a 90degree beam covers a broad area, delivering dependable results up to depths of 36 m (120 ft). Longlasting power for allday trips: up to 10 hours of operation on a single charge, suitable for daylong fishing sessions. Use scenario: boat or shore fishing on a lake or river, where you can use depth and temperature data to locate likely fish hotspots and tailor your lure depth. Use scenario: river or bank fishing, where a compact unit easily fits in a tackle bag and helps adjust fishing depth based on depth readings. Use scenario: extended fishing outings, with the 10hour battery life enabling continuous use from dawn to dusk without frequent recharging.