Wireless Audio Baby Monitor, Plug Type:US PlugFeatures1. Adopt frequency hopping spread spectrum(FHSS),Anti-interference and sound clarity2. Work Frequency Band: 900MHZ ISM,905925MHZ3. Long distance transmission 200-300 meters in the open field4. Transmitter and Receiver need making pairing code before any opperation, Confidentiality is strong5. With 2-way talk, music and nightlight function6. When there is without any sound from Transmitter within 20 seconds,the receiver will be in mute state7. This product does not have a batteryParameters1. Operating frequency ISM 905-925MHz2. Transmission power 10 dBm3. Modulation mode FSK4. Spread spectrum method FHHS5. Audio encoding ADPCM6. Modulation frequency 180 KHz7. Code rate: 500 Kbps8. Receiver sensitivity 92 dBm9. Power supply mode 5V USB or 3pcs AA dry battery10. Transmitter operating current 180 mA MAX (all open)11. Transmitter standby current 75 mA MAX12. Receiver operating current 75 mA MAX13. Battery specifications 3pcs 1.2V AA dry battery 14. Operating Temperature 0C-50CParts list:- Parents machine x1- Children's machine x1- Charger x1- Instructions x1