I have extensive experience in arduino and bioengineering, your project is feasible, this would include ARDUINO 1, lcd screen 16X2 characters, battery, battery charger by USB port, on / off button, reset button, piezo buzzer, two buttons + - for Sensitivity adjustment or a potentiometer, a bracelet for ground, connector for implant needle, we have the material to make a prototype. Functional as you want, with two languages to select, counts of 100, total counts, one beep for each implant, two beeps per 100. In case you require the prototype could be delivered without cost you would pay the shipping.