This kit from Nopadol includes everything to alert you to videophone and doorbell with flashing lights in 2 different rooms. Purchase transmitters to be alerted to different events and receivers to be alerted in additional rooms. Includes Flashes red light for doorbell and white light for videophone 2 Flash Receivers 1 DC 5V 500mAh USB power cable for receiver 1 Doorbell Transmitter 1 Videophone VP Transmitter Flash Receiver Features Flashes red light for doorbell and white light for videophone Wireless 650 ft range Use for temporary room lighting Powered by 3 AA batteries (not included) or DC 5V Dimensions: 6" x 6" x 6" Videophone Transmitter Features Receiver flashes white light for videophone call Up to 300 ft range Adjust frequency codes to eliminate interference from neighboring systems Doorbell Transmitter Features Receiver flashes red light for doorbell Uses 2 CR2032 batteries (not included) Feature Details Brand Nopadol Mfg part # MODEL A0221 Warranty One year warranty Color Tan / Beige / Natural Weight (lbs) 1.16 Battery operated? Yes (batteries required) Batteries included? No Battery details (3) AA Alkaline (not included), (2) CR2032 Lithium (not included) Country of Manufacture China System Nopadol Alert Type(s) Vibration Flashing Light Loud Audible Low Vision / Deaf-Blind No Yes No No Transmitter / Receiver Transmitter(s) and Receiver(s) Alert Trigger(s) Baby Cry Carbon Monoxide Mobile / Smartphone Doorbell / door knock Motion Pager / SOS Phone / VP Smoke / Fire Sound Severe Weather No No No Yes No No Yes No No No Range (ft) 300 Expandable Yes Portable Yes Battery backup Yes USB charger No