The Black Box ME800A-E Short-Haul Modem B Plus Async RS-232 Line Driver is a reliable and efficient modem designed for short-haul communication. With a range of 4 miles, this modem is perfect for connecting computers and networking devices in a local area. Its sleek black color and dependable Black Box brand make it a trusted choice for home and office use. The ME800A-E model provides quality and performance for all your networking needs.