Digital audio player, silver and blue design, Sony Walkman. - Brand: Sony - Model Name: Walkman NW-E405 - Color: Silver/Blue - Serial Number: S/N 5082298 - Features: Digital audio player Thank you for viewing. This is a nostalgic retro player. Many people used these during their school days and enjoyed listening to MP3s. I'm not sure about the battery life, but it seems to be charging and working at the moment. Each button is also responding properly. It's not a stored item, so there are some scratches and dirt, but I hope you understand that it is a working product. #SONY #DAP #mp3 #Walkman #WALKMAN #Retro #Audio #Player