BenQ treVolo is an electrostatic speaker designed to deliver impressive sound quality. With a Bluetooth module the speaker can play music from any paired devices. Thin diaphragms on both sides of the speaker can emit sound from the front and back sides. The electrostatic feature unites with the mid-woofer allow the speaker to optimize audio transparency and provide high pitch to deep low sound in a compact size. Therefore the breeze can satisfy user’s needs for a high sound quality yet portable speaker. The line out function enables users to transmit music from their devices to the home audio wirelessly.