I am selling this because I bought it for my dog who barked a lot, but no longer need it. The box, instructions, charging cord, and everything else are included. 【Preventing Excessive Barking with Proper Behavior Correction】 This smart anti-barking device is designed as a safe and effective behavior correction tool, utilizing high-frequency sound wave principles. It adjusts sound waves in a range (20kHz and above) that is inaudible to humans, effectively curbing unwanted barking in dogs. This product is suitable for various breeds of dogs aged 6 months to 8 years old and is designed not to affect a dog's hearing or health. Make pet training fun and stress-free.