Stylish, small and light catfish bite alarm set that detects vibration but also indicates a slow bite or a drop back. Nothing escapes a TOPCAT alarm. It Is waterproof (IP66 rated) and USB chargeable. Fully charged the batteries will easily last a week. Receiver requires 2 AAA batteries. • Adjustable volume (from 0 to 6) • Adjustable sensitivity (4 levels) • Drop back indication • Slow bite indication • Vibration indication (adjustable) • Night light • Fully charges in 2.5 hours • Low battery drain (internal battery lasts up to 240 hours) • Memory function • Low battery alert (at 20%) • Anti-theft alarm • 100m effective reach • Receiver responds real time (no delay) • User friendly navigation through the functions • Fast switch off (within 2 seconds)