1. Max 3 coins APPEAR/DROP (not only sound).
2. The distance depends on many factors, but usually 30 ft is not a problem. Always check before you start the performance.
3. You can use ANY coin with:
-max diameter: 38.1mm / 1.5in
-max thickness: 2.5mm / 0.1in
4.a. The gimmick is very reliable but always check the battery is charged before use, check the remote battery is charged before use, check correct working before start, dont drop, etc... As any other product, if used correctly you wont have a problem with it.
4.b. Yes, it use its own rechargeable battery, and comes with charger.
Regards
Martin Andersen
