Bosch TR-300, Speaker module, Black, 12 dB, 0.425" (10.8 mm), 0.5" (12.7 mm), 0.2" (5.08 mm) Bosch TR-300. Product type: Speaker module, Product color: Black, RX sensitivity: 12 dB. Width: 0.425" (10.8 mm), Depth: 0.5" (12.7 mm), Height: 0.2" (5.08 mm). Power consumption: 700 mA