Soyntec Vipfoner 270. Microphone sensitivity: 90 dB, Microphone frequency: 100 - 15000 Hz. Weight: 0.395 kg, Dimensions (WxDxH): 185 x 60 x 60 mm. Package dimensions (WxDxH): 165 x 63 x 227 mm, Package weight: 0.685 kg. Operating temperature range (T-T): 0 - 40 °C, Storage temperature range (T-T): -10 - 60 °C, Storage relative humidity range: 95 %