TRU COMPONENTS TC-6645408 2.87 inch 7.3 cm Mini speaker 1 W 8 Ω

Impedance (integer): 8 Ω; Max. frequency: 10000 Hz; Max. load (W): 2 W; Min. frequency: 300 Hz; RMS capacity: 1 W; Recess depth: 22 mm; Recess diameter: 77 mm; Sound pressure: 85 dB; Speaker features: Damp-proof, Plastic diaphragm, Transparent diaphragm; Speaker size (cm): 7.3 cm; Speaker size (inch): 2.87 inch

Price: £ 2.99 from Conrad Electronic