Innovative tape guide: Prevents jamming. Short stroke braking system: Reliable & direct contact, Integrated permanent stop function. High performance retraction mechanism: Granting a considerably longer life time. Adjustable ergonomic handle: Intuitive handling & safe use, Soft grip elements, comfortable haptics. Upgradeable: Docking slot for Multi Box - For treats or poop bags, Option for LED Lighting System. High quality snap hook: Safe connector.