The Pure Resonance Audio RMA500BT 5 channel Bluetooth commercial rack mount mixer amplifier provides 500 watts of high-performance Class H power. You can connect your Bluetooth device to the RMA500BT's multimedia player and also use a TF card, USB thumb drive, or the built-in FM tuner. The included remote control manages volume levels, play/pause, skip and more all from a distance. The forced air-cooling fan helps accommodate the long working hours of commercial business and public address applications making this compact and affordable mixer amplifier perfect for your office, school, restaurant, retail store, or any background music, paging or announcement complete audio system.The Pure Resonance Audio RMA500BT is lightweight and features a slim, space-saving design that allows it to only take up 1 rack unit. This amplifier solution includes a 4-16Ω/70V distributed audio speaker output, 2 AUX inputs, 4 MIC inputs, and 1 emergency channel input. In the event of an emergency, you can quickly use the emergency input to stop all other audio transmissions. This emergency input takes priority letting any integrated emergency voice alarm system be heard loud and clear. The overload level light indicators on the front of the unit provide valuable short circuit, overload, and overheating protection by alerting you to potential issues.