RS PRO 4Ω 1.5W Miniature Speaker, 10mm Lead Length, 30 x 11 x 3mm

Rated impedance (2.0k Hz/2.45 Vrms/in 2cc box): 4±15%Ω
Rated noise power (in 2cc box): 1.5W
Maximum short term power (in 2cc box): 2.0W
Resonant frequency (f0): 500±20% Hz (1V) in free air
Rated frequency range: 500Hz ∼10k Hz
Sound pressure level (2.45V/0.1M at 2.0K Hz in 2cc box): 95±3dB
Total harmonic distortion (at rated power/1KHz/10cm/2cc test fixture on baffle): 10%Max
Operating temperature: 20∼+70°C
Storage temperature: -40∼+85°C
Weight: 3.1g

Frame & Front Cover - PPA
Diaphragm - PEEK
Voice coil x 2 - Copper Wire
Solder Joints x 2- SUS (stainless steel)
Plate & Yoke x 2 - SPCC
Magnet x 2 - NdFeB

Wires to be soldered to solder points on rear of speaker.
Solder temp - 350-380°C for 2-3 seconds.