Simply clips around your dog's neck for instant illumination for 500 metres, making your dog unmissable. 70cm long, but the soft plastic outer and circuit can be cut to ensure a better fit. 3 light settings, flashing, speedy flash and constant light. Water resistant so safe in light rain. USB recharge. The band will need to be charged for at least 30 minutes. When the band is fully charged, the charging light will go off. When fully charged the band will last for 1.5 hours of constant light or up to 4 hours of flashing light.