Features: Wireless Audio Baby Monitor: Adopts ISM wireless technology, no interference and effective transmission range is up to 200-300M in open area, which enables you to hear your baby's voice clear in a certain distance. Two-way Talk Function: With built-in high sensitive microphone and speaker for two-way talk. You can hear your baby's voice clearly and use your voice to comfort her/him instantly when they are crying. Built-in Night Light & Music: With cute night lights, and built-in music for soothing baby to sleep. Parent unit can control the night light and music of the baby unit remotely, very convenient to use. Easy to Use and Carry: The volume of parent unit and baby unit can be adjusted freely by pressing the left or right button. The parent unit has a backside clip, which allows parents to carry it conveniently when doing some housework, very considerate design. Dual Power Supply Ways: The parent unit and baby unit both can be powered by 3 * AAA batteries(not included) or DC 5V 1A power adapter(included), more flexible to use. Specifications: Transmission Frequency: ISM 905-925MHz Transmission Power: 10dBm Modulation Type: FSK Transmission Range: 200-300M in open area, indoor range depends on actual environment Power Supply: 3 * AAA batteries(not included) or DC 5V power adapter(included) Power Consumption: 75mA Operating Temperature: 0 to 50 Item Size: 6.8 * 8.8 * 3.3cm/ 2.7 * 3.5 * 1.3in(baby unit); 6.8 * 8.8 * 3.8cm/ 2.7 * 3.5 * 1.5in(parent unit) Item Weight: 80g/ 2.8oz (baby unit); 82g/ 2.9oz(parent unit) Packing List: 1 * Parent Unit 1 * Baby Unit 2 * Power Adapter 1 * Users Manual(English)