Feature:Bluetooth V4.0 Waterproof +NFC Speaker+Power BankWaterproof，Dustproof， Anti-scratch， Shockproof，High temperature Resistant SpeakerStylish and exquisite appearance， which is convenient to carry，With it you can enjoy music anytime and anywhereNFC Technology (Near Field Communication) for easy and instant pairingHiFi and clear loud sound outputBuilt in microphone allows you to answer calls while listening to musicIPX4 Grade Waterproof， excellent for Outdoor Sport and exercise and TravelEnglish Voice Prompt functionUsed as 3600MAH power bank can charge your phone or other device in emergencyNote:Do not soak in water! It only support water mist- proof!Pairing:First， please make sure the PT-390A is power off and the Bluetooth devices is within 10m.Second， press Multifunctional key for 5-6 seconds until blue and red LED shine by turn.Third， activate Bluetooth of the device you want to pair， search and select "PT-390A" in the Bluetooth list.Fourth， according to indication， input the code "0000" and confirm.After pairing succeed， the blue LED of the headset shines twice or three times every 4 seconds.Specifications:Bluetooth Resolution:CSR 4.0Water resistance:IPX4Output Power:3Wx2Frequency Response:20Hz~20kHzBattery Li-ion:3.7VBattery Capacity:3600mAhDimensions:66mm*66mm*170mmAudio input:3.5mm Jack Cable and power connectorOn/Off/Bluetooth switchPower lndicator Light:Blue lightsRange:upto 10 metres open fieldItem size: 6.6 * 6.6 * 17cm / 2.59 * 2.59 * 6.69in (L * W * H)Package contents:1* Portable Bluetooth Speaker1* 3.5mm audio cable1* Micro USB charging cable1* Metal Hook Loop1* Instructions