The Pet Life ® Bark-Myst 3-Level Sensitivity of Spray and Tone Anti-Bark Dog Collar is a safe alternative to E-Shock Anti-Bark collars that is designed to emit a Non-Toxic and 100% Safe humane Citronella spray once barking is automatically detected. The spraying mist offers upto 3-levels of intensity that is conveniently adjusted directly on the collar. Includes 1-Spray bottle that provides upto 500 bark sprays with a 20-35 spraying capacity contained by the collar that refills in seconds (Additional 3-Pack refill bottles are sold seperately). The Bark-Myst includes a USB Charger that fully charges in 1-Hour and provides upto 12-Days of runtime with a Smart Power Saving Mode that automatically turns off with each spray that conserves battery.