The Klein Tools AEPJS1 is a powered speaker that provides 5 watts of high-quality sound for smart phones, tablets, computers and other audio devices via a wireless Bluetooth* connection or wired auxiliary input. It answers calls hands free with the built-in speakerphone and can be magnetically attached to any steel surface, attached to Klein’s Tradesman Pro Tough Cooler (Cat. No. 55650), Klein’s Lighted Tool Bag (Cat. No. 55431), mounted to a standard 1/4-20 tripod, attached to a lanyard, or simply stood up on any solid, level surface.