D-Link DCH-S150, Ceiling/wall, White, FCC, UL, Wireless, 2.4 - 2.4835 MHz, 100-240 V D-Link DCH-S150. Mounting type: Ceiling/wall, Product color: White, Certification: FCC, UL. Connectivity technology: Wireless, Operating frequency: 2.4 - 2.4835 MHz. Input voltage: 100-240 V, Input frequency: 50/60 Hz. Dimensions (WxDxH): 2.28 x 2.13 x 1.71" (58 x 54 x 43.5 mm)