PreSonus Eris 4.5BT 4.5-inch Powered Bluetooth Studio Monitors PreSonus $201.00 $134.00 ID#18736- This product is in "Excellent condition" with minor signs of use.At 50 watts, PreSonus' Eris 4.5BT studio monitors are a prime option for producers, gamers, and audiophiles working in...