I am very happy with this product. 1) The battery takes a long time, two weeks in the use I make, namely lighted office and car, 15 minutes a day on weekdays com, almost nothing in WE. Very well: the battery level is announced by voice at every starting: High, Medium, Low. 2) The sound is good in 2 directions. 3) Price. 4) super crafty left-right reversal. I use it with an Android mobile pho Alcatel OT918D. The only downside is that after a stop-start or after leaving the range and income, I do not always find the volume set previously. But with all the + first-mentioned, the 5 stars are deserved in my opinion. If tomorrow I lost him, I would buy immediately even without thinking.