Upgrade to the industry-leading technology of the SportDOG brand. The 825 features up to 1/2 mile range with seven stimulation levels that can be instantly set at the transmitter. Vibration/tone capability enables you to train without constant correction once your dogs have been conditioned. The rechargeable handheld transmitter can be expanded to three dogs with the purchase of extra collars, without losing the vibration/tone feature. Waterproof construction stands up to harsh in-the-field use. Unit includes the transmitter, one collar receiver with black strap, adapter, test light, lanyard, belt clip, long contacts, manual, and training DVD.