Dimensions: Approx 26.5cm Battery type: Two AA batteries (not included) Multi-functional: This great tool can straighten, detangle, and gently massage your hair and scalp with its vibration massage function! Electric Detangling Comb: Get a fabulous electric detangling comb! Gentle design: This comb has soft teeth, making it safe for the scalp by preventing harsh pull and frizz. Dual use: Glide through the tangles on both wet and dry hair. Grip: With an ergonomic design and an easy-to-grip handle, detangling will never be smoother.