1、OUTSTANDING SIGNAL: This wireless intercom system has clear sound quality and long range coverage with enhanced signal up to 3,280 feet to ensure clear sound quality. 2、10 CHANNELS AND 3 CODES: It has 10 channels and 3 digital codes. Meanwhile, with anti interference function, it can collaborate with intercoms with the same digital channel code. 3、CLEAR SOUND QUALITY AND CONVENIENT TALKING: Built in premium chip and with automatic noise cancellation function, it provides you with clear sound quality. In addition to that, it also has voice activation function that allows you to easily talk without shouting in the house. 4、EXPANDABLE AND CONFERENCE CALL: Users can add more intercoms to build a wireless intercom system for home or business. Simply press and hold the "Group" button and you can talk to all the intercoms in the system. You can also call specific people by pressing the "CALL" button. 5、MOBILE POWER SUPPORT AND EASY TO USE: It's compatible with 5V 1A mobile power, so you can easily take it anywhere. Functions include listening, calling, voice activation, group calling, etc., and the volume can be adjusted. Item Type: Wireless Intercom System Material: ABS Frequency Range: 462-467MHz Number Of Channels: 0-9 Channels Power: 0.5W Receiving Sensitivity: -120dBm Frequency Interval: 25KHz Frequency Error: ±500Hz Modulation Mode: FM Specification: UHF Operating Temperature: -25-65 Degrees Celsius Volume Adjustment Levels: 8 Levels 2 x Wireless Intercom 2 x Power Adapter 2 x Charging Cable