Silicone Earmuff for Z Tactical SRD Series kruisbogen the device has overheating and Kleur:Everglade the device has overheating and reverse polarity protection and a driver with current digital regulations Batteries: 1 x CR2032 (not included) Length: 80 mm Weight: 210 g Shipping weight: 390 g Weight: 40 g Shipping weight: 160 g