RojecoPD521 1000m Hundetræningskøler med 2 kraver (sort)RojecoPD521 1000m Dog Training Collar with 2 collars (black) The set consists of two Rojeco PD521 anti bark collars, designed for dog owners who want to effectively improve their pet's behavior. With several operating modes and a durable design, the devices will work well both for daily training and for eliminating unwanted habits such as barking or biting objects. After a full charge, which takes just 1 2 hours, the receiver can last for about 60