1When the noise in the baby room is below 40db for more than 20 seconds, vox will be activated and the display will eliminate slight background noise. 2 When the noise exceeds 40db, the monitor will wake up and let you know accurately when your baby makes any sound. 3 two-way intercom, 2.4GHz dedicated signal, standby for up to 20 hours. 4. Easy to carry, the main unit is rechargeable and portable, 1000 feet outdoor/160 feet indoors. 5. The night light can be controlled remotely, making it more practical and convenient to use. Condition: Product Type: Baby Sound Monitor Material: ABS+ Electronics Parent Unit Battery Model: Lithium Battery (Included) Parent Unit Battery Capacity: 500mAh 1A Child Unit Batteries Not Included Sound Monitor Dimensions: Approx. 10.5 x 7 x 5 cm/4.1 x 2.8 x 2 inches (master) Sound Monitor Dimensions: Approx. 10.5 x 7 x 5 cm/4.1 x 2.8 x 2 inches (child unit) For best results, charge the parent unit before use. After initial charging, charge normally as required. After plugging the power adapter into the device and installing the battery, the console can run normally. 1. Plug the adapter into a power outlet. Connect the small end of the USB power cord to the DC jack of the parent device. The power LED will light up red. 2. Press and hold the Shanda power switch button for 2 seconds to turn on the parent phone. The power LED will illuminate green to indicate 3. Once both the baby unit and parent unit are turned on. The parent unit will transmit the audio captured by the baby unit. 4. If there is no connection or out of range, the audio will be turned off and the parent device will beep quickly after failure to re-establish the link. Move the parent unit closer to the baby unit until the link is re-established. 5. Press and hold the power button to turn off the parent device. 2 x Sound Monitor 2 x USB Cable 1 x Plug 1 x Manual Do not expose the baby monitor to extreme cold, high temperature, and do not place the product near heat sources. Do not expose batteries to excessive heat, bright light, or flame. Do not immerse the parent unit and baby unit in water. Do not wash under tap. Do not use cleaning sprays or liquid cleaners. Never place the infant unit in a playpen. Do not cover the baby or parent end with anything such as towels or blankets. To prevent being strangled by the power cord, please always keep the baby end at least 1 meter away from the power source, and do not use extension cords. Please note that new and old models of this product will be sent randomly, please make sure you don't mind before placing an order.