portable mini speaker
1:model:RB-4028008G-03ER
2:dimension:40mm*28mm
3:spc:8ohm 2w~4w
4:low distortion,reliable,wide use

portable mini speaker

Dimension as show in the bottom

 Weight: Approx 25.6 Grams

Magnet: Material  Nd-Fe-B    Size Φ12.5×2.0mm.

Impedance: 8 ± 15%  Ohm    at 1000Hz 1V

Power rating: Normal 2.0w   Maximum 4.0w

Lower resonant frequency: 700±30% Hz

S.P.L.: 100±3dB/1.0Watt 0.1Meter.   Average At1000,1200,1500,2000Hz.

Frequency range: FO~8,000Hz.Average SPL-10dB.

Distortion: 10%  Maximum  At 1000Hz. 1.0W

Abnormal Sound Test: Must be Normal Tested by4.0 Volts. Sine wave for50~5kHz

Polarity: Diaphragm Shall Move Forward When Apply a Positive DC

Operating temperature: -20 °C  to +80 °C

Storage temperature: -25 °C  to +85°C