This Polar H7 92052229 sensor measures heart rate, then syncs data with your compatible device and mobile training app via Bluetooth Smart technology, so you can easily monitor your workouts. A chest strap offers a comfortable fit.
Have used this for several months now and have not had any issues. Works well when paired with the map my fitness apps on Bluetooth (have not used it with any other app). Also works well my Polar FT7 watch.
JBL Flip 3 Speaker: Stream your favorite songs and Internet radio stations from your compatible audio device using this speaker, which offers extensive playback with the rechargeable battery. Dual external bass radiators offer booming low tones, and you can enjoy clear phone calls with the integrated speakerphone.
I have had this speaker for about a month now and use this to listen to my MP3 player on my work bench and am really amazed at the sound reproduction. Great audio clarity for such a little speaker. What surprised me the most was the bass reproduction. Good punch but may not be strong enough for some peoples taste. May be a little under powered for some as I have to crank the volume almost to full on the speaker but no distortion noted. I try not to turn the volume up to loud on my mp3 player (no higher than 50%) to save the battery. Battery does not seem to be a problem as I have used the speaker for more than 10 hours without needing to charge. I use this with a direct connection from MP3 to speaker as I have not been able to get Bluetooth to work. That is not the speakers fault as this is all operator error. I would really recommend this for anyone looking for a great portable speaker. Really impressed.