Waterproof 8GB Sport MP3 Music Player Neckband Stereo Earphone Sweatproof

Head mounted waterproof MP3Model: KYK-1681 Program: BR61992 support system: Windows / OS MAC system (genuine) WIN7, WIN103 frequency response: HZ 30HZ-20K4 operating temperature: 0 ~ + 50,5 power format: built in rechargeable lithium battery (160 MA)6 play time: full after listening to music for about 4-6 hours7 supported formats: WMA, MP3 music format8 function: Waterproof music Bluetooth headset9 play time: 4-6 hours of continuous listening to music10 long charging time: about 2 hours (not over 3 hours)11 charging voltage: 5V12 charge current: 500 mA13 capacity: 4GB/8GB(Please leave the message if you'd like to 4G)14 waterproof level: international protection class IPX815 host material / size: 6*1.5*2.6CM ABS16 bracket material / size: 13*12*1.5CM PP17 List of products: MP3 host 1; stent 1; waterproof 2 pairs of ear plugs; sports ear plug 2 pairs; wipe cloth 1; charging adapter 1; manual 1.18 packing size: 15*15*3CM19 full weight: 110 g