One of the best selling e-collar in the market. The Dogtra ARC has a slim design receiver/collar that is ergonomically shaped to your dog's neck and has a low to medium output that is designed for all breeds with medium to soft temperaments. The transmitter have checkered grips designed to have the owner a firm grip, giving a positive feel during training.It has Rheostat/volume dial with up to 127 levels for a gradual adjustment in stimulation intensity depending on the owner's preference of training and have 'Nick' and 'Constant' stimulation along with a non-stimulating pager/vibration. It also has a LCD screen that displays exact level of stimulation and a 3 bar battery life icon to indicate the battery life. Both transmitter and receiver/collar are waterproof and has a 3/4-mile range. It comes with a Rechargeable 2-hour rapid charge Lithium Polymer battery and can expand training up to 2 dogs.