HP 636925-001 - Internal speaker assembly - Size40mm (1.5-in) X 28.5mm (1.1-in), 4ohms at 2 Watts Retail
HP 378521-001 - Speaker assembly - Power rated at 2-watts per channel output - Includes left and right speakers Retail
HP 348352-001 - Speaker assembly - 2-watts per channel output - Includes left and right speakers (JBL) Retail