- Frequency-hopping spread spectrum (FHSS)
- Direct-sequence spread spectrum (DSSS)
- Hardware gain adjustable
- Built in 3S lithium battery charging function
- Stable wireless performance even in bad condition
- Full two-year warranty; extended warranties avaiable
TF520 has high resolution sonar image, which can provide you more clear details of bottom. It adopts wireless technique of Frequency-hopping spread spectrum (FHSS), which can be applied to a wider range of wireless remote control devices. The 4.3"TFT LCD, resolution 480*272Pixels, is easy to see in full sunlight and from wide viewing angles.115 kHz sonar operation provides up to 60 degrees of conical coverage, which is ideal for displaying largest fish arches and searching large area.