Valcom V-762-BK, Desktop/Wall Talkback Speaker, Black, PairCondition:* New Stock,No OEM Packaging. As Pictured.Additional Notes:* Perfect choice for high quality voice paging, two-way communication, and emergency alerts for indoor areas.* Self-standing, or can be wall-mounted.* Talkback intercom* Indoor use only* Impedance: 45 Nominal* Temperature: -4 to +131F (-20 to +55C) * Humidity: 0-95% Non-condensing * Dimensions (HxWxD): 3.90″ x 5.10″ x 3.20″* Frequency Response: 220 Hz to 10 kHzValcomV-762-BK