PETINCCN P681 660 Yards Remote Dog Training Collars Waterproof and Rechargeable with Four Functions of Range Finding Tone Vibrating Static Shock Trainer Pet Collar 1. The receive collar is small.Able to fit small,medium and large dogs. 2. Range: 660 Yards. 3. Remote Training Collar with 4 Functions: Range finding,vibration, shock, Tone. 4. Range finding definition:Can be detect the distance between Transmitter and Receiver. 5. Tone Vibration Static Shock Options: Can be adjusted the level continuously for Vibration Static Shock Range finding.1 Level of Standard Tone. 6. Remote Transmitter can control up to two collars.Waterproof Collar Receiver. 7. Power saving design with Automatic Standby and Memory Function. 8. Battery Type: Rechargeable Lithium Batteries for Collar Receiver and Remote Transmitter. 9. Battery power can be displayed by three different colors of the indicator light. 10. Charging cable is the Android general Microusb cable.