Specifications:
Bluetooth 4.0
Waterproof,Dustproof, Anti-scratch, Shockproof,High temperature Resistant Speaker
NFC wireless connection (Near Field Communication)
Perfect Powerful Bass Sound
Power output: 5W x2
Hand-Free Speakerphone for Calls
Metal Hook Loop for Easy Attachment to Chain, Wire, Karabiner, Clip, etc
Housing:wire meshes+silicone
12 Hours playback
Battery: 3.7v 2000 mAh Li-ion battery
Charging time:3 hours( when full charged,the red indicator light will be off)
Support Multi-Pair: up to 8 devices
Drive Unite:two 40mm
Bluetooth Frequency: 20Hz-20KHz
Bluetooth Profile Supported: A2DP,AVRCP,HSP,HFP
Wireless Range:25M
Dimensions: 6.69 x 2.59 x 2.59 (inch)
Weight: 15.3 ounces

Package contents:
1* Portable Bluetooth Speaker
1* 3.5mm audio cable
1* Micro USB charging cable

1* user manual