1When the noise in the baby room is lower than 40db for more than 20 seconds, vox will be activated and the display will eliminate slight background noise. 2Until the noise exceeds 40db, the monitor will be awakened and it accurately lets you know when your baby makes any sound. 3Two-way intercom, 2.4GHz dedicated signal, standby up to 20 hours. 4Convenient to carry, the parent unit can be charged and carried, 1000ft outdoor/160ft indoor. 5The night light can be remotely controlled, making it more practical and convenient to use. Condition:100% Item Type: InfantSoundMonitorMaterial: ABS+ Electronic ComponentsParent Unit Battery Model: lithium battery (included)Parent Unit Battery Capacity: 500mAh 1AThe subunit does not contain batteriesSound Monitor Size: Approx. 10.5 x 7 x 5cm/4.1 x 2.8 x 2in(parent unit)Sound Monitor Size: Approx. 10.5 x 7 x 5cm/4.1 x 2.8 x 2in (sub unit)For best results, please charge the parent unit before use. After initial charge, charge normally as required. The parent unit can operate normally with the power adapter inserted into the device with the battery installed.1. Plug the adapter into a power outlet. Connect the small end of the USB power cord to the parent unit of the DC jack. The power LED indicator will light up in red.2. Press and hold the power on/off button of Shanda University for 2 seconds to turn on the parent unit. The power LED indicator will illuminate green to indicate3. Once both the baby unit and the parent unit are opened. The parent unit will transmit the o captured by the baby unit.4. If there is no connection or you are out of range, the o will be turned off and the parent unit will beep quickly after failing to re-establish the link. Move the parent unit closer to the baby unit until the link is re-established.5. Press and hold down the power button to turn off the parent unit. 2 x Sound Monitor2 x USB Cable1 x Plug1 x Manual Do not expose the baby monitor to extreme cold, high temperature, humidity or direct sunlight.Do not put the product near the heating source.Do not expose the battery to excessive heat, bright sunlight or flame.Do not immerse the parent unit and infant unit in water. Do not wash them under the tap.Do not use cleaning sprays or liquid cleaners.Never put the baby unit in the playpen. Do not cover the infant unit or parent unit with anything such as towels or blankets.In order to prevent from being strangled by the power cord, please always keep the baby unit and power supply at least 1 meter, and do not use an extension cord.Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.