NORBY Sim Card Slot Sim Tray Holder Replacement Part for Sony Xperia Z2 (Black) FeaturesSingle-to-noise ratio: 84 db or higherSensitivity: 80 db + 2 dbThe output power: 3 w * 1Distortion rate of 1% or lessThe speaker specification: 4 om 3 w 40 mmInput power supply: DC 5V 500.