Wide Application:The portable fishing depth finder will work good in boating fishing, kayak fishing, canoe fishing, pontoon fishing, shore fishing, ice fishing. No matter you are beginner of fishing or an experienced angler, the handheld fish finder will help you get more fun at fishing, and if you want to choice a fishing gifts for your friends, husband, father, the handheld fish finder is the right one!. Wired Sonar Transducer: The wired sonar of portable fishing finder can be fixed easily on boat, kayak hull with transducer mounting kit ( accessory item). And as there is a float block on sonar transducer cable, you can also throw the sonar into water directly without fix it on boat or kayak. Water Depth Finder: The handheld fish finder has an fish and fish schools alarm function, when fish is detected, alarm will let you know at real-time. Depth Measurement Unit is selectable: FT/M. The portable fish finder powered by 4XAAA battery, and at power save mode, the water depth finder can work all day if you use new batteries. Portable Fish Finder:The portable fish finder has strong detect ability although it’s small and compact. The water depth detect range of the fishing finder transducer is between 3ft(1m) and 328ft (99.9m), and as the sensitivity of water depth finder is select-able, you can use it anytime no matter the water is clean or turbid. The operating temperature of handheld depth finder is 14°F to 122°F(-10°C-50°C). Handheld Depth Finder Portable Size:With this fishing finder transducer, you can get the fishing point easily, quickly and correctly. The portable fish finder will provide you water depth, fish and fish schools location, bottom contour information at the same time, and as it has a back light mode, you can also use the handheld fishing finder when you fishing at night or dark environment.