【Tomy 2-Way Home Safety Monitor Standard】 This is a monitor that uses sound only, like a transceiver ＼(^o^)／ It's very helpful when you're away from the child (^o^) Parent unit (receiver) Child unit (transmitter) 2 dedicated AC adapters included *The parent unit shows some slight discoloration. When speaking from the parent unit (the child's room's audio is always heard from the parent unit's speaker), press the "talk button" on the parent unit while speaking to have a conversation with the child unit (the child unit is always connected, so of course, the audio reaches the parent unit without pressing any buttons). Volume can be adjusted. • Operation confirmed Price negotiation possible! Instant purchase also welcome! #Ships within 24 hours (based on past performance)