Wheelock LSPKW Led 2W Hf Spkr Sq Semi Flush Wall 24Vdc Wht No LtrThe Wheelock Exceder LED3 speaker strobes and speakers by Eaton feature high fidelity sound output and an advanced power saving LED technology for indoor wall mount applications. With the widest frequency response range (300 to 8000 Hz) in the industry, the series LSPK and LSPST3 feature leading intelligibility with crisp, clear voice messages and tone signaling, ideal for emergency communications, mass notification, voice evacuation and fire alarm.