Boult Audio CR-BLK1 Crystal 5W Portable Wireless Bluetooth Room Speaker with Mic (Black) Enjoy crystal clear HD sound with this 32 faceted ultra portable speaker, 32 facets: Crystal has 32 different facets all directing the sound to 32 different directions producing perfect multi-dimensional 360 degree sound in all the directions. Portable: A nylon carrying cord makes the Bluetooth speaker both portable and versatile – hang it clip it lay it toss it or lay it flat. Specifications: Bluetooth version : V4.2, Chipset : CSR8635, Weight : 149g, Operation range : 10m, Bluetooth profiles : HFP/A2DP/HSP/AVCRP Battery capacity : 3.7V, 500mAh Battery type : Li-ion input parameter : 5V-100mA.