Ready to use when powered on. Not only can it monitor the baby's voice 24 hours a day,but it can also talk to the baby at any time. The signal transmission distance is long,and it is suitable for use on the same layer or vertical partition. Let the mother know the baby's movements at any time. 2.4GHz wireless technology for stable signal transmission Comfort your baby with the sound of your own voice by using the two-way talk-back system 300 meters of outdoor signal transmission distance without interference; 40 meters of indoor transmission distance (depending on the environment,the transmission distance will be reduced due to various signal interference) There is a rechargeable polymer lithium battery on the parent side,which is easy to charge The baby has a night light,that gently illuminates the darkness Small and portable,easy to carry around ECO/VOX smart wake-up mode Standby time up to 12 hours in ECO mode Specification: Battery type: polymer lithium battery Battery capacity: 500mAh Rated voltage: 3.7V Wireless frequency: 2.4GHz Product size: 10*7*3cm Net weight: baby unit: 72g,parent unit: 96g Package included: 1 x Baby Unit 1 x Parent Unit 1 x English User Manual 1 x Adapter 1 x Portable Cable (30') 1 x Adapter Cable (58.3')