V30 Wireless Audio Baby Monitor Support Voice Monitoring and Intercom and Night Light without Battery, Plug Type:US Plug Features 1. Adopt frequency hopping spread spectrum(FHSS),Anti-interference and sound clarity 2. Work Frequency Band: 900MHZ ISM,905—925MHZ 3. Long distance transmission 200-300 meters in the open field 4. Transmitter and Receiver need making pairing code before any opperation, Confidentiality is strong 5. With 2-way talk, music and nightlight function 6. When there is without any sound from Transmitter within 20 seconds,the receiver will be in mute state 7. This product does not have a battery Parameters 1. Operating frequency: ISM 905-925MHz 2. Transmission power: 10 dBm 3. Modulation mode: FSK 4. Spread spectrum method: FHHS 5. Audio encoding: ADPCM 6. Modulation frequency: 180 KHz 7. Code rate: 500 Kbps 8. Receiver sensitivity: 92 dBm 9. Power supply mode: 5V USB or 3pcs AA dry battery 10. Transmitter operating current: 180 mA MAX (all open) 11. Transmitter standby current: 75 mA MAX 12. Receiver operating current: 75 mA MAX 13. Battery specifications: 3pcs 1.2V AA dry battery 14. Operating Temperature: 0°C-50°C Parts list: - Parents machine x1 - Childrens machine x1 - Charger x1 - Instructions x1 Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.