TWO-WAY TALKInternal microphone and talk for two-way talk and audio control. Parents can talk and comfort the baby. pressing the talk button STABLE TRANSMISSION 2.4GHz digital wireless transmission with stable transmission signal. The transmission range of the audio baby monitor in an open space is up to 250M INFANT SIGNAL INDICATION High sensitivity, allows baby crying to be easily heard with the light on to inform parents EASY TO USE TO USESupport data encryption and volume adjustment. Plug and play, just connect the power supply for both units, easy to operate. match. Note: Battery: 3 x AAA (n &deg; 7) for each (excluded) SIZEUnit Size baby: about 62 x 40 x 103mm / 2.4 x 1.6 x 4.1in; Unit Size parent size: approx. 62 x 45 x 103 mm / 2.4 x 1.86 x 4.1 inch Specification: Condition: 100% brand new Material : ABS Color: white Optional plug type: US 100-240V, EU 100-240V, UK 100-240V, AU 100-240V Supply voltage: DC 5V< br />Transmission frequency: Ism 2400-2483 MHz Transmission power: 17 dBm Modulation type: FSK Power consumption of the unit baby: 70 mA Sensitivity of the unit Paretn: -85 dBm Battery: 3 * AAA (n &deg; 7) for each (excluded) Working temperature: -10 &deg; ~ + 60 &deg; Storage temperature: -40 &deg; ~ + 70 &deg; Unit size baby: Appox. 62 * 40 * 103 mm / 2.4 * 1.6 * 4.1 inch Unit size parental: Appox. 62*45*103mm/2.4*1.86*4.1in Package Weight: Appox. 347g / 12.2oz Package List: 1*unit; baby 1 * Unit of parents 1 * power adapter for parent unit baby 1 * power adapter for the unit 1 * English User Manual Note: 1. Please remove the battery or power plugs when not in use for a long time. 2. Please do not use external power when using regular AA batteries in case of danger. 3. The rechargeable battery can only be 1.2V AA NiMH battery, please do not charge it to avoid reducing the battery life when not in use. e for a long time. 4. Please do not use in high temperature and strong magnetic field. 5. Please note that the new type and old type of this product will be sent randomly, and make sure you do not mind before ordering.