Altec Lansing Geemel Twin BT Speaker black For the Altec Lansing Geemel, the device makes use of Bluetooth V 4.1 and supports HSP, HFP, A2 DP, and AVRCP. It has an operation range of up to 10 Meters. These two speakers have a combined output of 10 W A range of 150 Hz - 15 KHz and have both a 3.5 mm audio jack and a Bluetooth 4.1 connection. When fully charged, they can last you up to 8 hours. Perfect for a day at the beach, a picknick or any other outdoor activity.