Features: 1.This intercom doorbell kit has stable signal and long working distance. 2.Easy to install. Low power consumption, long standby time. 3.Mainly used in villas, commercial office buildings, private clubs, etc. 4.This suit has two intercoms and one doorbell, with fashionable appearance. 5.Rain-proof design, built-in super-large battery, the appearance is simple and beautiful. Specification: Features:_x000D_ 1. This intercom doorbell kit has stable signal and long working distance._x000D_ 2. Easy to install. Low power consumption, long standby time._x000D_ 3. Mainly used in villas, commercial office buildings, private clubs, etc._x000D_ 4. This suit has two intercoms and one doorbell, with fashionable appearance._x000D_ 5. Rain-proof design, built-in super-large battery, the appearance is simple and beautiful._x000D_ _x000D_ Specification:_x000D_ Condition: 100% Brand New_x000D_ Item Type: Intercom Doorbell_x000D_ Material: ABS_x000D_ Frequency Range: 470.000-480.000MHZ_x000D_ Rated Voltage: DC3.7V_x000D_ Lithium Battery: 3.7V 1800MA_x000D_ Antenna Impedance: 50_x000D_ Working Mode: Same Frequency Simplex or Different Frequency Simplex_x000D_ Output Power: 5W_x000D_ Modulation Mode (Broadband, Narrow Emperor): 16K F3E, 11K F3E_x000D_ Maximum Frequency Offset (Broadband, Narrow band):