ULTRAK Wireless Buttons for L10 and L20 from $489.00 Style Ten wireless buttons with one receiver One wireless button with one receiver Additional wireless lane button Qty. Add to Cart Compatible with both Ultrak L20 and L10 Operated by radio frequency Presettable RF channels avoids cross interference with nearby L20's or L10's 30 meter/100 foot operating range 1 receiver box can link up to 10 buttons User presets lane numbers for each individual button Battery operated (2 AAA batteries for buttons and receiver box) Compatible with all versions of L20 and L10 Available options include a receiver box and either 1 or 10 lane buttons Additional buttons also sold separately Wireless Button Instructions