The 'Glass Tube Key' is a tiny glass tube used as an alternative key ('user key') for the M-Lock RFID ignition lock.  

Please note the possible significantly reduced operating range in comparison with the Teardrop Keys (5-10 mm). Furthermore, the operating range is subject to wider tolerances.

A maximum of 3 keys may be associated with one M-Lock at the same time. For teaching additional keys the associated 'master-key' to the M-Lock is required.

Some extra info about the M-Lock
Motogadget M-Lock RFID Ignition Lock. Yeah, that is pretty high-tech chopper stuff! No hassle with keys, but just walk towards your bike and start it! Only make sure that your keychain is about 40-50mm from the M-Lock.

The M-Lock is a contact-free digital ignition lock with RFID technology and substitutes mechanical ignition locks or their electrical switching feature respectively.

The associated digital key/transponder only has to be approached to the M-Lock (switching distance approx. 40-50 mm) and the ignition is switched on or off completely contact-free.

The M-Lock is based on the latest RFID technology (Radio Frequency Identification) and therefore, unlike e.g. radio remote controls, tamper-proof. Each key/transponder has a unique digital code. 
The M-Lock can be actuated with the correct digital code only.  Key/transponder and M-Lock are absolutely free of mechanical wear.
The M-Lock switches automotive relays with a possible load of up to 40A - sufficient power for every onboard system.

The hidden mounting of the small M-Lock, covered by non-metallic parts like e.g. a plastic side panel, permits completely removing the mechanic ignition lock. Clean look and various design possibilities are guaranteed - especially for custom bikes!

The available option 'Glass Tube' is so small (3 x 13 mm) that it can be sewn into the glove. Please note the reduced switching distance (about 5-10 mm) of the Glass Tube transponder. The 2 included standard keys (teardrop shape) are key fob sized.

All keys/transponders are available as a replacement 'key blank' and can be 'taught' to the desired M-Lock. 

NOTE: We do not recommend using the M-Lock combined with immobilizers! Contact your dealer/manufacturer for information about the possible deactivation of the immobilizer.

Dimensions and specifications
Transmitter/receiver, diameter of installed assembly: 30 mm
Height: 14 mm
Cable length: approx. 50 cm
Weight incl. cable: approx. 30 g
Fixture: 2 x M3 threaded hole on back side
Operating voltage: 6V - 18V
Operating temperature: -20 °C to +80 °C

So, what do you receive?
M-Lock with approx. 50 cm connector cable, 1 user key and 1 master key (teardrop shape), 1 automotive relay 12V/40A, 4 flat pins with isolating sleeves, connector, removable fuse, detailed installation and operating instructions

All advantages summarized

• RFID technology is tamper-resistant
• Each key has a unique code
• The key first activates the M-Lock without touching it and then, via the relay, the entire onboard system
• Neither key nor M-Lock suffer from mechanical wear
• The key requires no battery - failsafe
• No overload or scorched pins possible due to indirect switching via the 40 A main relay
• The M-Lock is very compact an can be mounted hidden in many places
• Water tight and vibration resistant because of the moulded-in construction
• Depending on the model, key sizes range from very small (key fob sized) to tiny (glass vial) and may be integrated into other objects like gloves, clothing, pendants (NON-METALLIC!) etc.
• Keys can be easily purchased and 'learned' to any M-Lock - your integrated locksmith
• A switching distance of 4 - 5 cm ensures convenient switching while excluding the possibility of accidental engagement
• An integrated LED shows the status of the M-Lock while mounting, connecting and 'teaching' new keys