The Shokz S661 is an open-ear bone conduction device that allows you to control your audio while staying aware of your surroundings. Power ON/OFF : Hold Volume+ for 2s (On) or 3s (Off).
: Fits a 1/8 DIN cutout, requiring 3.24 inches (82mm) of rear depth. s661 controller manual exclusive
The is an industrial device designed for panel mounting: Power : Operates on 120/240 VAC. The Shokz S661 is an open-ear bone conduction
The "S661" refers primarily to the , a popular pair of bone-conduction headphones often categorized as a wearable audio controller for sports and lifestyle use. There is also a industrial Simpson S661 Rate Counter , which acts as a digital controller for industrial pulse counting. s661 controller manual exclusive