Features:1. Wireless Sound-light bite alarm2. Color: Black (there might be a slight color difference)3. LED Color: Blue4. Size: 7.8cm*5.5cm*4cm5. Material: Plastic6. Battery cell: 3 ¡Á LR44 button cellThe package includes:2 ¡Á Fish bite alarms2 ¡Á Anti-slip mat(Battery are not included )