Portable Wireless Bluetooth Fish Finder Smart Sonar Depth Finder with iOS & Android Phone APP for Kayak/Ice/Boat Fishing

JOYLOG smart sonar fish finder integrates high-precision miniature sonar system which can detect the location, size, depth and other underwater fish feelings within the range of 40m underwater, as well as underwater topographic map, water depth, water temperature and other information. JOYLOG APP enables you to grasp the underwater dynamics in real time on your mobile phone.

The depth range is from .6 meters to 40 meters (1.97 ft to 131 ft). The frequency is a set 125 KHz with a detection angle of 30 degrees. The detection angle of 30 degrees is smaller than most portable sonar systems. The communication method is bluetooth which will limit the total range and cause issues if there is not direct sight of the system between it and the phone. The range is stated at 164 foot, but that can be limited by a lot of different factors. Some of the factors are any item between you and the device or even what type of phone you have.

The battery is a 3.7V with 1000mAh and is rechargeable by a USB cord. We found the battery size is a great aspect of this sonar device. Most people found they can use it all day without any issues. Even with the size of the battery, the device only weighs in at .19 pounds.

The app is on both Android and IOS. The setup is simple, but the manual does not go in great detail each function. We do like how it shows the strength and allows you to enlarge section of the screen.

In closing, the device seems to work great and most customers find it fits their needs. The detection angle limits the overall use, but can be worked around. The biggest issue I have seen is the customer service. If you have a problem with the product, there is no one to contact. Maybe they will see this review and will contact me. If that happens, I will update the review, but I must wait till that happens.

Another issue I had was the linking with the phone. This device uses bluetooth which causes issue if the device is out of your sight. When I had it out on the water testing it, it would easily loose signal with the up and down motion of the waves.

I spoke to master catfish man Thomas from Lake Tawakoni Guide Service and he stated this isn’t something he would use.


  • Color: White
  • Package Size: 4.3*4*2.7 inch
  • Size:Diameter 2.6 inch
  • Net Weight: 0.19 Ib
  • Gross Weight: 0.51 Ib
  • Battery Capacity: 3.7 V, 1000mAh
  • Sonar Frequency: 125KHz
  • Detection Angle: 30︒
  • Detection Depth: 1.96 ft-131 ft
  • Working Temperature: – 20℃-70℃
  • Communication Mode: Bluetooth
  • Communication Range: 164 ft

Joylog Smart Sonar Fish Finder

Quality 7.5
Customer Service 3.0
Warranty 3.0
Battery 7.5
Features 6.0


  • Weight
  • Battery


  • Customer Service
  • Warranty
  • Detection Angle


  1. Wow Its looks good, I think it is one of the perfect tools for someone starting out and when the people usually fish it handy and portable… thanks for sharing I might gonna try!


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