PD 216 AI Smarts Anti Barking Collar With Shock1. Color screen Anti Barking Collar For Dog; With Shock 2. With power saving design, (charging 2 hours, working 60 days) 3. Lithium battery Rechargeable,can check battery inventory 4. For medium and small sized dogs 5. Function: beep+static shock 6. Sensitivity adjustable: 4 gears, press the "M " key to adjust the gear, 0 gear is the test gear, 1 3 gears are the working gears, 0 gear can also be used for work 7. Working mode: Press the "Power button "