Manufacturer: Knowles Acoustics • Series: BK • Impedance: 13.3 Ohm • Type: Magnetic, Balanced Armature, End Port • Size / Dimension: 7.87mm L x 5.59mm W x 4.01mm H • Termination: Solder Pins/Posts • Shape: Rectangular • Other PartNo: 423-1056, BK-8507-P16