Model GPT -Single Tone for line pull and line in
If use in the dark-- Led on top of the calliper will be lighted up, when surrounding light level is low/dark or when light dimes
- there is a light sensor  to active this  light up  when surrounding light dimes or becomes dark.   Circuit board seal with epoxy -- will not be damage or short circuit when drop into the water 
Compact unit: width between calliper 28mm
Can be used in conjunction with Wire receiver model WJ or YJ
 

Model GHT Light up when dark .
Either as stand alone or in series connection with a wired receiver
On/off switch
Strike or bite activation light: Red
20 sec light  up led light when line is latch on
optical eye to activate led light when light condition is dime or dark

Can be used in conjunction with Wire receiver model WJ or YJ

Model XPT
Stand alone  bite indicator
*Start-up light: blue
*On/off switch
*Led start-up activation  20sec light up
*Bite activation light: blue
*Volume control and 5 adjustable tone.
compact unit Width between calliper horn: 28mm

Model GSP -- Bite indicator- Special features: bite activation Warning Led light has 2 colour for
IF line is being put out: activating - flashing RED light
If line comes in or slack-- flashing Green light

If use in the dark-- Led light on top of the calliper will be  when it is dark or when light dimes
- there is a light sensor  to active this  light up  when surrounding light dimes or becomes dark

 Circuit board seal with epoxy -- will not be damage or short circuit when drop into the water