This Instinct X4 Piece Wireless Receiver Bite Alarm System is a feature-rich setup designed for reliable bite detection in all conditions. With a splash-proof design and inbuilt memory, each alarm unit offers dual LED indicators, night lights for low-visibility sessions, and 8-level control over tone, volume, and sensitivity. It includes a low power warning, tone and alarm function, and precise 1:1 sync transmission for real-time alerts. A 2.5mm jack allows connection of additional accessories, and each unit operates on 2x AAA batteries (not included). Ideal for serious anglers who demand versatility and precision.