Product Specification:

Output power: RMS 3W x 2

Frequency : 150HZ-18KHZ

Speaker Specifications : Φ40mmx1/4Ω

Signal to Noise Ratio : ≥ 75db

Power Supply: ~ 5V-USB 3.5 stereo head

Lithium Battery : 3.7V 1000mA

Material: Plastic

Features: Built-in battery,