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To turn it off, please switch the power switch to the “O” position. Thank you for buying the new BT90S Traveller Speaker and, or the BT65N Stereo Audio Adaptor. You can use the A/C power adapter (optional, not provided) to power up the BT90S directly or place 3 AAA dry batteries into the BT90S to obtain the power. Bluetooth Bluetooth I.Traveller Speaker paired with Bluetooth enabled (with A2DP and AVRCP profiles) Mobile Phone / PDA /MP3 Guide 1. Battery cover(Insert 3 AAA batteries). 2. Power ON