Dear customer, If you have any problem, please contact us at first, do not refund,Thanks Cher client, Si vous avez un problème, s'il vous plaît contactez-nous au début, ne pas rembourser, Merci Lieber Kunde, wenn Sie irgendein Problem haben, treten Sie mit uns bitte zuerst in Verbindung, erstatten Sie nicht, Dank Kära kund, Om du har några problem, vänligen kontakta oss först, återbetal inte, tack Feature: Bluetooth V4.0 Waterproof +NFC Speaker+Power Bank Waterproof,Dustproof, Anti-scratch, Shockproof,High temperature Resistant Speaker Stylish and exquisite appearance, which is convenient to carry,With it you can enjoy music anytime and anywhere NFC Technology (Near Field Communication) for easy and instant pairing HiFi and clear loud sound output Built in microphone allows you to answer calls while listening to music IPX4 Grade Waterproof, excellent for Outdoor Sport and exercise and Travel English Voice Prompt function Used as 3600MAH power bank can charge your phone or other device in emergency Note: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 4.0 Water resistance:IPX4 Output Power:3Wx2 Frequency Response:20Hz~20kHz Battery Li-ion:3.7V Battery Capacity:3600mAh Dimensions:66mm*66mm*170mm Audio input:3.5mm Jack Cable and power connector On/Off/Bluetooth switch Power lndicator Light:Blue lights Range:upto 10 metres open field Item size: 6.6 * 6.6 * 17cm / 2.59 * 2.59 * 6.69in (L * W * H) Package contents: 1* Portable Bluetooth Speaker 1* 3.5mm audio cable 1* Micro USB charging cable 1* Metal Hook Loop 1* Instructions