Product FeaturesHigh-fidelity music and speech reproductionSupplied with adjustable wall‑mounting bracketSelf‑restoring overload protectionProvision for internal mounting of the optional line / loudspeaker supervision boardEN 54‑24 certifiedKey SpecificationsColor: White; Customized colorsCoverage angle HxV (-6 dB, 1 kHz): 174 x 127 °Coverage angle HxV (-6 dB, 4 kHz): 136 x 141 °Dimensions (H x W x D) (mm): 274 x 160 x 180 mmFrequency range (-10 dB): 90 – 20000 HzMaterial: AluminumOperating temperature (°C): -25 – 55 °CRated input voltage (V): 70 V; 100 VSensitivity (1 W, 1 m, 1 kHz octave): 88 dBStorage temperature (°C): -40 – 70 °CWeight (kg): 3.88 kg SKU: BOS.LB1-UM20E-L Color: White Amperage Rating: 15 A Voltage Rating: 70/100 V Storage Temperature: -40 °C ... 70 °C Operating temperature: -25°C To +55°C Dimensions: 274x160x180mm Material: Aluminum Brand: BOSCH Supplier Part Number: LB1-UM20E-L