The Wireless DHF system offers schools an easy way to upgrade or replace an existing bell system. The DHF uses wireless tones and bell controllers to create a powerful bell system.
The DHF system offers fully programmable daily or weekly schedules, each with of up to 500 bell tones per day. Tone schedules can easily be programmed from a PC computer or over a local network.
The wireless DHF bell system uses HF radio waves. The frequency used is part of the license free ISM band (Industrial Scientific and Medical) according to ETS 300-220 European standard.
Mains advantages : 
• Wireless bell system throughout the school
• Eliminates inaccurate bell activation time
• Perfect solution for school additions and renovations
• Easy system expansion and installation
• Reduces maintenance costs (no cabling)
Note: The Wireless DHF System is expendable and can also synchronises your clocks
Example: School

Bodet Wireless Bell Systems offer schools with the latest and most innovative way to incorporate synchronised clocks and bells through your premises, providing you with the benefits of better productivity and reduced maintenance costs.
Schools have a great need to synchronise all clocks, bells and other equipments such computer network, lighting or heating systems, to one accurate time source.
Using a safe radio signal (Please refer to Wireless System) , the Wireless DHF system sends accurate atomic time information, to wirelessly synchronise all premises clocks and bells