Baby online 300m-500m is a high-tech and multi-functional audio baby monitor using Digital Green Technology, designed to emit the lowest possible levels of radio waves and keep baby safe. The long range of 300m and two alarms offer ultimate peace of mind, wherever you are.
Specifications:

Powered by rechargeable Lithium Battery (parent's unit) and 3 AAA batteries (Baby's unit) or mains operated (adapters included).
300m -500m range
VOX function (voice activated)
Automatic channel search
High quality, clear sound with zero interference
2 alarms: audio, visual
Night light function - can be voice activated or continuous
“Out of range” and “Low Battery” audio alarms