Same Sky (formerly CUI Devices) CMS-1805-24SP 18 x 5 mm, Round Frame, 2 W, 4 Ohm, Neodymium Magnet, PU & PEN Cone Speaker

Frame: Round

Width: 18mm

Height: 9.2mm

Length: 18mm

Dimension: 0.2, 0.71, 0.71in

Impedance: 4Ohms

Mounting Type: Solder Pads

Nominal Input: 2W

Max Input power: 2W

Resonant frequency: 610Hz

Datasheet