Fangrui Product Details 1. V30 Wireless Audio Baby Monitor Support Voice Monitoring + Intercom + Night Light Without Battery, Plug Type:us Plug 2. Features 3. Adopt Frequency Hopping Spread Spectrum(fhss),anti-interference And Sound Clarity 4. Work Frequency Band: 900mhz Ism,905-925mhz 5. Long Distance Transmission 200-300 Meters In The Open Field 6. Transmitter And Receiver Need Making Pairing Code Before Any Opperation, Confidentiality Is Strong 7. With 2-way Talk, Music And Nightlight Function 8. When There Is Without Any Sound From Transmitter Within 20 Seconds,the Receiver Will Be In Mute State 9. This Product Does Not Have A Battery 10. Parameters 11. Operating Frequency Ism 905-925mhz 12. Transmission Power 10 Dbm 13. Modulation Mode Fsk 14. Spread Spectrum Method Fhhs 15. Audio Encoding Adpcm 16. Modulation Frequency 180 Khz 17. Code Rate: 500 Kbps 18. Receiver Sensitivity 92 Dbm 19. Power Supply Mode 5v Usb Or 3pcs Aa Dry Battery 20. Transmitter Operating Current 180 Ma Max (all Open) 21. Transmitter Standby Current 75 Ma Max 22. Receiver Operating Current 75 Ma Max 23. Battery Specifications 3pcs 1.2v Aa Dry Battery 24. Operating Temperature 0°c-50°c 25. Parts List: 26. - Parents Machine X1 27. - Childrens Machine X1 28. - Charger X1 29. - Instructions X1