Envoi is a compact AC/battery-powered PA system designed for professional-grade sound reinforcement to an outdoor event or large interior space when there is no access to AC power. Envoi can operate for up to 12 hours off its built-in rechargeable battery, which provides a cord-free power supply for its powerful internal Class D amplifier. The amplifier drives a high-output 10-inch 2-way speaker system in a compact, lightweight enclosure. Envoi can also be plugged into an AC outlet.

Envoi also streams music wirelessly from any Bluetooth-enabled device, plus with its TRS Aux output, you can daisy-chain as many additional Envoi speakers as needed.

Features include:

• Two-way active speaker (10-inch low-frequency driver, 1-inch high-frequency driver)
• Built-in rechargeable battery provides up to 12 hours of cordless sound
• Includes 16-channel UHF wireless microphone with automatic tuning and batteries
• Bluetooth connection for wireless audio streaming
• Built-in USB/SD (MP3/WMA) player for unattended playback
• Pole-mount socket, telescoping handle and transport wheels built in
• Two-band EQ and reverb effect
• Mic 1&2 combo inputs with Mic/Line level selector switch
• ¼-inch aux input connector
• Built-in storage holds two microphones and accessories

Here are all the specs.