A permanent 'invisible' marker pen with high quality UV ink that isn't easily rubbed off unlike inferior pens. 

Some of the many uses include:

• security marking property with your house no. & postcode to aid recovery by the police if stolen

• for concealed marking of items to prove ownership

• fun for kids writing secret messages to each other

• discrete marking of items to see whether they have been changed when lent out or sent away for repair etc.

Markings are invisible under normal light conditions and fluoresce under Ultraviolet 'Black light'.

The permanent UV marker also has the following advantages over standard UV markers.

• The pen offers a brighter UV mark
• Does not fade like standard UV pens
• Extended UV lifespan with indelible marking

Introducing our security warning stickers:

'Warning' labels 48mm diameter - permanent, self adhesive (indoor use)

Apply these stickers directly onto valuable items to deter thieves (please note these stickers use permanent adhesive).

If you want to warn anyone with these stickers but do not want to directly apply to your valuable item, you can apply it to a card or info sheet and attach or put on top of the valuable item. Ideal for shop owners displaying goods.

This item is now available within this listing as an optional extra, please select from the dropdown menus if you wish to add these.

Please Note: For orders of UV Light Keyring for UK addresses these will be ready to use straight away.

The law does not allow devices with batteries to be posted overseas. So for overseas orders we will remove the batteries. You should be able to order these locally (2 x CR2016) and install them yourself (a mini phillips screwdriver will be required)