FlyFish

Electronics on Board is only the tip of the iceberg of all the interesting stuff is hidden in the coil

Battery capacity can be calculated, knowing the current consumption of the device.

Unfortunately these data are not available.

The CSR8645 chipset is a Stereo ROM solution with Qualcomm® aptX™ codec technology and helps set a new standard for wired or wireless stereo audio quality.

STM32F103VBH6 STMicroelectronics ARM Microcontrollers - MCU 32BIT Cortex M3 128K 20KB RAM 

Internal-Photos-3643443.pdf

For work under water is a useful indication of the target vibration

The vibration signal can be connected as in metal detectors CEIA cmd the additional device

Or mounted inside the unit as in the mobile phone When using vibration under water, you can work without headphones

1 hour ago, Steve Herschbach said:

I have had Equinox on both highly mineralized salt water beaches and freshwater beaches. I have been pleased and impressed with what I saw.

What did you like the operation of the Equinox in Saltwater compared  CTX and Excalibur 

Your personal opinion

It is very unfortunate that there is no information on the type of battery and the voltage of the device