The Dogtra ARC features a low profile receiver collar that is ergonomically shaped to your dogs neck. The checkered grips on the handheld transmitter allow you to always have a firm grip of the training at hand. The ARC is a low to medium output e-collar designed for all breeds with medium to soft temperaments. Package contents: transmitter, receiver/collar, battery charger and splitter cable, test light, owners manual, and metal belt clip and screws (2).