Welcome to our store! 1、Enjoy secure and reliable wireless digital encrypted transmission with this baby monitor. It features two-way intercom and 5-level adjustable volume. 2、This baby monitor offers two-way talk, built-in music, and a night light that can be turned on/off remotely. 3、With FHSS technology for anti-interference and crystal-clear sound, the transmission distance can reach 200-300 meters in open areas. 4、The transmitter and receiver must be paired before use for security. 5、When there is no sound from the transmitter for 20 seconds, the receiver will enter silent mode. 6、The Baby alert monitor operates on the 905-925MHz ISM band. Item Type: Baby Sound Monitor Weight: Approx. 424g / 15oz Material: ABS Model: V30 Usage Environment: Indoor Power Supply Voltage: 5V Operating Frequency: 905-925MHz Transmission Power: 10 dB Modulation Method: FSK Spread Spectrum Method: FHHS Audio Encoding: ADPCM Modulation Frequency: 180 kHz Encoding Rate: 500 kilobits Receiver Sensitivity: S-92 decibels Power Supply Mode: Power supply or 3 x AAA dry battery (battery not included) Working Temperature: 0℃-50℃ Open space transmission range: Approx. 300m / 984.3ft Includes: 2 x Monitor 2 x Power Plug 1 x Manual If you encounter any product issues after receiving the goods, such as damage or incorrect quantity, please contact the seller immediately. We will do our best to provide you with satisfactory customer service.