Used, slightly, very good condition. Virtually Unhackable Long Range System - Secure and interference-free coverage up to 1500 feet, over four full-size football fields; more secure than wi-fi enabled devices Long Lasting Battery - Use AC power or Rechargeable Batteries to power your baby monitor; Battery life is 13 hours in standby mode (audio on) or 5 hours of continuous operation Smart Alerts - Motion, temperature and sound sensors with automatic notifications activate whenever action is required Talk to Your Baby - Equipped with a microphone and speaker for 2-way communication, you can soothe your baby back to sleep with your voice without distracting them Gentle, Soothing Sound - Comes with 5 types of white noise sound as well as a selection of lullabies, all designed to lull your baby into a deeper, more restful sleep