wireless invisible gsm earpiece for test
SpecificationCompatibility : The earphone, together with the inductive loop work with mobile telephones,radiotelephones, to enable two-way communication.They may also be used to play the sound using any portable sound player: an mp3 player, a Dictaphone, etcSize : 5x7x10mmShape : anatomical shapeReceiver type : magnetic/analogueMaximmum volume : 110dBBattery : sony sr416sw/337Battery Life : 8hNet Weight : 0.8gInterference : <2%How to use the wireless earpiece?1. Put the battery like on the picture.2. Set loopset at your neck and connect it to device - Mobile phone, MP3 Player or other device .3. Close the battery case and put the earpiece at your ear.4. Make connection with other person which you want to communicate.For better sound quality please make these steps:1. Clear your ear canal.2. Before put in earpiece at your ear, please dial service number (if you use it with mobile phone). Then start to put in earpiece at your ear with round movement at your ear.3. Set volume at maximum for better sound quality.4. Use earpiece and loopset at short distancePacking content:Micro earpiece: 1pcNeckloop: 1pc2.5/3.5mm connection adapter: 1pcHigh quality battery: 1pc