As for the controls arranged around the volume knob, they consist of a Play/Pause button, two Track Shuttle keys for Rewind/Previous track and Fast Forward/Next track, a bass-boost button, and the On/Off switch. To the right of the controls is a Bluetooth LED indicator. On the back of the M1 are the charger jack, a battery-status LED indicator, and a line-in audio jack if you don't want to use Bluetooth.
Setup is pretty easy. Just plug the M1 speakers into a wall outlet for a few hours or until the battery-status LED light is green. To pair a Bluetooth device to the M1, just press the M1's On/Off switch for about five seconds (make sure it's off first) and wait for the Bluetooth LED indicator to flash blue and red. Then turn on the Bluetooth mode in your device and pretty soon you'll be paired, connected, and ready to go. The M1 can be used with any device that supports stereo Bluetooth, from cell phones and music players to PCs and Macs.
We paired the M1 with the LG Chocolate 3, which has stereo-Bluetooth support. Sound quality was fantastic. The M1 has an internal subwoofer with 28-watts RMS output, which helped in creating a really loud maximum volume as well as a pretty decent bass output, especially with the bass-boost mode turned on. It made our tiny little MP3 sound so much richer than it did on the cell phone. Do note that the M1 has an operating range of 10 meters.
While we would've liked a removable battery, or maybe an option to use regular alkaline batteries when a wall outlet isn't in sight, we think the M1 lived up to our expectations overall. The BlueAnt M1 stereo-Bluetooth speaker has a rated playback time of 3 to 4 hours on high volume and 10 hours on medium volume. It has a rated standby time of 62.5 days and a charging time of 3 hours.