Ideal for realtors, secretaries, and receptionists, the PM200 Expansion Module adds extra BLF (Busy Lamp Field) buttons to P-Series IP phones for extra functionality. The PM200 Expansion Module is the perfect upgrade to the P330 or P370 IP phone, adding u. Manufacturer: Sangoma Technologies Corporation. Manufacturer Part Number: 1TELPM200LF. Brand Name: Sangoma. Product Model: PM200. Product Name: PM200 Expansion Module. Packaged Quantity: 1. Product Type: Phone Expansion Module. [Display & Graphics] Screen Size: 4.3". Screen Type: LCD. Screen Resolution: 272 x 480. Backlight: Yes. [Controls/Indicators] Buttons & Keys: 20 x Programmable Keys, 20 x Virtual Pages of Added Functionality. [Power Description] Power Source: USB. DC Adapter. [Physical Characteristics] Color Family: Black. Product Color: Black. [Miscellaneous] Compatibility: Sangoma IP Phones:P310, P315, P320, P325, P330. Certifications & Standards: FCC Part 15 B. [Warranty] Limited Warranty: 1 Year.