This is a no-bark training collar that uses sound and vibration for training. It's a small size, but adjustable, and I was able to easily fit it on my Shiba Inu. I've used it about twice. It requires two CR2023 batteries. Batteries are not included. - Brand: REDDiPET - Model Name: NO-BARK TRAINING COLLAR - Size: SMALL - Features: No electric shock - Settings: Sound and vibration settings, with adjustable intensity. - Instruction Manual: Included