Can't turn off the Sennheiser MM 100 Bluetooth Stereo Headset. The blue lights are blinking without stop. What to do to turn off the headset?

Found this online. Hope it helps you out.

Switching the headset on
To switch the headset on:
Press and hold the Play/Pause button for 2 seconds.
An ascending confirmation beep is heard in the headset and the LED indicates the current operating mode. Flashing in blue indicates that the battery charge status is OK; flashing in red indicates a low
battery (see page 6).
The LED flashes several times every second:
The headset is paired to one or several Bluetooth devices and tries to connect to one of these devices.
The LED flashes slowly (once every second):
The headset is paired to one or several Bluetooth devices. However, there is no current connection because the
Bluetooth device is switched off or out of range.
The LED flashes once every 3 seconds:
The headset is paired to one or several Bluetooth devices. However, there is neither an audio transmission nor an active call.
The LED is glowing slowly every 4 seconds:
The headset is paired to one or several Bluetooth devices, a sound file is received via A2DP and played back or
paused.
The LED flashes once every second:
The headset is paired to one or several Bluetooth devices and there is currently an active call.
If you switch on the headset and keep the Play/Pause button pressed for 5 seconds, the headset will go into pairing mode (see ?Pairing the headset? on page 9).
The LED flashes alternatingly in red and blue for up to 60 seconds:
The headset is not yet paired to any Bluetooth device. Pair it as described under ?Pairing the headset? on page 9.

Almost definitely bad battery.

To Pair the Sennheiser VMX 100 headset with your cell phone:
At the same time as you open the mic, you also need to push down on the bottom/volume-down button on the side of the earpiece and hold this down (at the same time as opening the mic) until the light flashes red and blue alternating. (Just to clarify, it is the button that has an arrow pointing toward the Sennheiser logo). If asked for a code, enter "0000" (four zeros).
This video shows the bluetooth earpiece connecting to an iPhone 4S running iOS 5.0 (not jailbroken). This is the standard way to pair these devices (and it should work for Android phones as well), but as a disclaimer:
If anything should happen to your phone or your Bluetooth earpiece, it is not my fault.

Bluetooth Headset

Pairing Instructions

1. When you turn on your Samsung Bluetooth

headset for the first time, it proceeds into pairing

mode immediately.

2. If you have paired the headset with other

Bluetooth devices, make sure that the headset

is off. Press and hold the Multi-Function button

until the blue indicator light stays solid blue after

blinking.

3. Set your Bluetooth phone to discover the headset

by following your phone's guide. Typically, the

steps involve going to a 'Setting', 'Connection',

or 'Bluetooth' menu on your phone and then

selecting the option to discover Bluetooth devices.

4. Your phone will find the Samsung headset and

ask if you want to pair with it. Confirm this by

pressing the Yes or OK key.

5. Enter a passkey or PIN, 0000 (4 zeros), then

press the Yes or OK key.

6. If pairing was successful, the indicator light will

flash in blue 10 times rapidly before going to

flashing every 3 seconds. If unsuccessful, the

light remains on, and you will need to re-attempt

pairing.

7. When you turn on your headset after pairing

with the phone, the headset is automatically

connected to the phone.

8. When you turn on your phone after pairing with

the headset, the phone is connected to the
headset by pressing the Multi-Function button.

Did you find a solution? I have the same problem!

I dont owe one.

To Pair the Sennheiser VMX 100 headset with your iPhone or other cell phone:
At the same time as you open the mic, you also need to push down on the bottom/volume-down button on the side of the earpiece and hold this down (at the same time as opening the mic) until the light flashes red and blue alternating. (Just to clarify, it is the button that has an arrow pointing toward the Sennheiser logo). If asked for a code, enter "0000" (four zeros).
This video shows the bluetooth earpiece connecting to an iPhone 4S running iOS 5.0 (not jailbroken). This is the standard way to pair these devices, but as a disclaimer:
If anything should happen to your phone or your Bluetooth earpiece, it is not my fault.

In order to have music streamed to a bluetooth headset, it must bear A2DP (Avanced Audio Distribution Profile). You see, all stereo bluetooth headsets available on the market do support that profile. Nevertheless, the VMX100 is a monaural headset, thus bearing both HFP (Hands Free Profile) and HSP (HeadSet Profile) only, which are suitable for phone calls only.
Well, depeniding on your phone platform, you might find applications around which route all audio to a monaural bluetooth headset. However, you would, most probably, find the sound quality to be pretty poor.
Please, let me know if I can help you any further.
Regards, Carlos

Have your phone do a search for Bluetooth devices (have the earpiece turned on) and when it locates it, type code "0000" to pair.

Well I have had the same problem as well, twice really. The first one got replaced by Sennheiser, very good service. Unfortunately about a year later the same problem, I am waiting now what they will do with this. I really like the little earphones but I need them to work. Untill now I have had great service which of course comes with the quality of the name.