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Contact SupplierOutput power: RMS 3W x 1
Frequency : 150HZ-18KHZ
Speaker Specifications : Φ40mmx1/4Ω
Signal to Noise Ratio : ≥ 80db
Power Supply: ~ 5V-USB 3.5 stereo head
Lithium Battery : 3.7V 1000mA
Material: Aluminum