PRODUCT INTRODUCTION BN702T is a bone conduction hearing aid headphone , instead of using traditional speaker , it use bone conduction technology to transmit sound . unlike traditional earphones transmit sound by air , BN702T doesn't plug or cover users' ears, It transmit sound by skull to help people with weak ear drum and poor hearing . And of course people with good hearing also can wear BN702T , in that case, users could hear outside voice and earphone voice at the same time . while people nearby can't hear your BN702T , but you can listen to them and listen to your BN702T at the same time . BN702T can be used when you are working , studying ,sporting ,or for hearing aid purpose . HOW TO USE 1. When the user communicates with his family, wearing the BN702T hearing aid headphone , he can clearly receive the voice of his family. 2. For the elderly and their family watch TV together , but don't need turn the TV voice to uncomfortable level for normal people . 3. Connect the transmitter T10 with the mobile phone through the audio cable. so that the old can make phone calls and listen to music.( transmitter T10 connect to 702 earphone by Bluetooth ) 4. Use the audio cable to connect the transmitter T10 with the radio, PAD and other equipment. The elderly could hear the sound of the devices clearly from 702 earphone . 5.And the 702 earphone also can work independently as a Bluetooth earphone , to connect to mobile phone , or other devices' Bluetooth . Both the headset and the transmitter box are automatically connected wirelessly after booting, and enter the working mode. 1. The microphone of the transmitter T10 receives the sound around and transmit to 702 earphone , so the person with the headset 702T can hear sound around transmited to him through skull by bone conduction technology . 2. The transmitter T10 can be connected to TV, computer and other equipment through the audio cable, and the person can wear the earphone 702 to hear the sound of those devices. NOTICE : *The bone conduction earphone is very useful for people with weak ear drum , but hearing nerve is still good . This is a general condition for most elderly . but if your hearing nerve is damaged , this earphone can't help , pls don't buy . you can consult your doctor for advice in advance .PS. if traditional hearing aid by air is helpful to you , the bone conduction earphone is useful for you too , in a healthy way . *The bone conduction earphone transmitter sound through user's skull , instead of by air , New user might need spend some time to learn and find a most suitable position to wear the earphone . *People with good hearing might feel the bone conduction earphone voice is low or noisy . it's because usually people with good hearing would focus on the sound through his ear drum only , and ignore sound through skull , and even turn the bone conduction earphone volume to highest to try listen clearly . such doing is wrong , bone conduction earphone works in different way of traditional speakers . Pls let the user with poor hearing try by themselves ,the earphone is very helpful for them , they can listen the sound through skull clearly . PRODUCT FEATURES Product: Headphone 702+ transmitter T10 For Bluetooth version: for Bluetooth 4.0 Support: HSP, HFP, A2DP, AVRCP protocol Frequency response: 20Hz-2000Hz Sensitivity: 123 & plusmn; 5dB Impedance: 32 Working range: up to 10 meters Battery: Built-in 220mAh rechargeable lithium-ion battery Input: DC 5V+ 0.1V, 500mA Music play time: 6 - 8 hours (music volume will affect time) Charging time: 2 hours WHAT IS IN PACKAGE BN-702T (full set 1 x Bone Conduction Headphone (black/blue color ) 1 x Transmitter T10 Bluetooth , with a gift cord 1 x USB Charging Cable 2 x User Manual 1 x 3.5mm audio cable 1 x 3.5mm to RCA audio cable BN-702TN (full set 2 x Bone Conduction Headphone (black/blue color ) 1 x super Transmitter T10support 2 earphones , Bluetooth , with a gift cord 1 x USB Charging Cable 2 x User Manual 1 x 3.5mm audio cable 1 x 3.5mm to RCA audio cable bonein is a prestigious Chinese company , focus on audio technology and hearing health industry .our BN702T earphone with latest bone conduction technology , it transmit sound through ear ossicle instead of ear drum . unlike traditional air conduction hearing aid earphones , simply raising sound level to hit the ear drums , this method might lead to further damage to elderly's ear drums . our bone conduction earphone transmit sound through ear ossicle (a soft bone enclosuring ear nerve ), goes directly to ear nerve and protect elderly's ear drum . BN702 headset is waterproof , also good for young people to wear for sports ,listening music , watching TV . it's a brand