品牌 comfree 型号 mmd-0553-bl 电池类型 锂电池 待机时间 120（h） 通话时间 60（h） 有效通话距离 10（m） 免提接听功能 有免提接听功能 耳机接听功能 有耳机接听功能 适用机型 所有机型（csr芯片） 供应新蓝牙耳机，蓝牙免提耳机，蓝牙无线耳机 样 品 承 认 书 sample spec approval sheet sample & drawings for customer approval 客户名称 : customer 样品型号 : mmd-0553-bl model no. 制作 (maker) draw by 品管部 (qc) checked by 工程部 (engineer) checked by 核准 (manager) approved by 检查 (checker) tested by 核对 (checker 2) checked by 承 认 (director) approved by client opinion 口 approved 口 reject reason: client signature: please return one set sample approval sheet to us with your approved signatures ， thanks! shangye street, yongjun road, shuilang country, dalingshan town, dongguan city, guangdong province, china tel: +86-0769-85417910 fax: +86-0769-85411010 e-mail: (1)yujialtd@globalso(2)yujia@pub.dgn (3)market1@yuj homepage:www.yuj global sources:www.globalso/yujialtd.co 1 profile with bluetooth chipset built-in, this headset can be used to enjoy your music and you won&quo;t miss any call while you&quo;re working. volume adjustable, last/next song pick up, pause function, high seitivity microphone, no echo ， with noise cancelling. music would pause automatically while a call&quo;s coming in, and would start again while you end your communication, so that you can enjoy your music at any moment. 2 product drawing butto stereo sound effect 3. button description ： ： ooff/play/pause/ ， keep press it for start the machine, then keep press again for shut down. when the machine started, click this button for play, click again for pause. click it for communication when a call&quo;s coming in. ： click it for next song. ： click it for last song. v+ ： volume down. v - ： volume up. 4. specification ： static current ： under 10ua working current ： under 30ma working voltage ： 4.2v charge current ： 30ma---150ma （ red led light up ） headset output power ： max output power ： l 20mw r 20mw （ 32ω ） battery capacity ： 330mah 3.7v charge time ： 3 hou working time ： above 8 hou battery life ： charge and discharge≥300 times bluetooth receiving available distance ： open and no block, available distance≥10m input voltage ： dc___5v/200ma plug in usb port of pc standby time ： above 30 hou support v2.1+edr bluetooth veion class 2 5. user guide ： 1.pairing ： keep press for 6---8s, the headset would search the other bluetooth device automatically （ blue led /red led flash by tur ）， then open bluetooth function of mobile phone, choose to search a new bluetooth device, when mobile phone show model mmd-0553, that mea it has found the headset, choose to link the headset, input bluetooth default password 0000, paring succeed. 2. ?? ?for next song ， ? for last song 3.v+ 、 v for volume adjust 4. click for pause. pause for50s,then the machine would shut down automatically 5. keep press for shut down. 6. use usb cable for charge. when the machine is charged, red led light up and would out after finishing charge. 7. audio in ： 。 plug the other end of this cable in od3.5 jack of mp3, so that it can act as a wired headset. 6. reliable test. test condition, normal temperature (5-35℃), normal humidity (45-85%), normal pressure (860-1060mbar), temperature 20±2℃, relative humidity 60-70%, pressure is 860-1060mbar 。 high temperature test: it is in normal condition after exposing at 50℃ for 60 hou. low temperature test: it is in normal condition after exposing at -30℃ for 60 hou. humidity test: it is in normal condition after exposing at 30℃, 95% for 60 hou. power test: no difference after inputting 1mw noise for 48 hou . 7. note 1. don&quo;t expose product in high temperature or iulation place. 2. don&quo;t keep discharge product for a long time, please charge it every 15 days at least. 8. accessories audio cable ： charge cable ： 9 ． product photos: