- Built-in repeater receives and retransmits clock sync signal - 915 - 928 MHz frequency hopping technology - Internal antenna - Built-in diagnostic mode for easy maintenance - 5 yr battery life (standard) or 8 yr battery life (economy) - Black ABS case and polycarbonate crystal - Optional double mount housing available (see CL-DMA16) - Battery Life: 5 years (normal mode), 8 years (economy mode) using (2) Duracell Procell "D" Batteries (not included). Note: standard alkaline batteries can be used but will have a slightly shorter battery life - Clock Dimensions: 16.7? (423mm) outer diameter, 2.6? (66mm) depth - Movement Dimensions: 7.32? x 3.46? x 1.81? (186mm x 88mm x 46mm) - Shipping Weight: 4.5 lbs (2.04 kg) - Temperature: 32?F to 90?F (0?C to 32?C) - Humidity: 5% to 95% non-condensing - Time Base: Quartz automatic calibration - Input Sensitivity: -103 dBm - Operating Sensitivity: 915-928 MHz frequency hopping technology - Transmitter (Repeater) Power Output: 0.25 Watt (8 dBm), transmits up to 500 ft in open space - Compliance: FCC compliant, part 15, section 15,247 (no license required) - Color: Black - Dial: Durable polystyrene material - Case: Smooth surface ABS case - Crystal: Shatterproof, side molded polycarbonate crystal - Mounting Kit Includes: (2) plastic anchors, (2) 10 x 1.5? sheet metal screws, (1) 4mm threaded 10mm length screw (attached to bracket), (1) mounting bracket, (1) knurled nut, (1) battery cover screw