The range of transmitters have a double push radio channel for elective requests for assistance (HUA). Powered by lithium battery technology, for a longer working life cycle. The 705 gives you theflexibility of a secondary programmablechannel whilst the 706 has a built-in tilt sensor for ‘man down’. 710 is a single channel HUA radio device with belt/pendant mounting options and replaceable battery with extended radio range. The 726 a long range, single channel radio HUA device with belt clip.