LED Rechageable Collar; Florescent Colors Perfect for small, medium and large dogs; brillant florescent colors USB rechargeable lighting systems gives 3 to 4 hours of use between charges; no replacing batteries, this will provide years of use LED lights in Red Blue and Green in three modes; solid, fast flash and slow flash Provides visibility and safety for those evening walks Also available is a matching leash, see this leash and all the other eporium product offerings by clicking on the eproium name above