Cute Wireless Baby Monitor Cry Alarm Reminder 2 Way Audio Talk Portable Mini Electronic Security System EU Plug Feature: 2.4GHz digital wireless transmission, stable transmission signal. Built-in microphone and speaker for two-way audio monitoring. High sensitivity, easy to hear crying, lights will turn on to notify parents. Easy pairing, plug and play. Place the transmitter about 1.5-2.0 meters away from the baby. Both the mother machine and the baby machine can be powered by DC 5V or 3*1.5V AAA batteries (battery not included). Volume adjustment. Two-way walkie-talkie, support data encryption. Both receivers have built-in microphones and speakers. Open space transmission range up to 250M. Specification: Shell material: ABS Size: About 88*72*33mm Note: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-2cm measuring deviation due to manual measurement.