This is a review of the Garmin Venu Sq Music. As expected from Garmin, the measurement accuracy is quite high, and battery life depends on how you use it. The best feature is the heart rate transfer mode (sends HR data via ANT+ to paired devices), which allows it to connect to Garmin cycling computers and ANT+ cycling computers as a heart rate monitor. You can use it as a heart rate monitor for your cycling computer, and it also has GPS, so it can display speed like a cycling computer. Another feature is Suica compatibility, which is convenient when you don't have your smartphone or can't take it out of your bag. You can make payments directly with the watch, not through your smartphone, which is very convenient. The biggest difference is the music function, which can hold about 150 songs. You can connect the watch to earphones and use it as a music player, and it also functions as a heart rate sensor, making it a very convenient device. Of course, there are no operational problems. Regarding the battery, I charge it after using it for about 3 days, when it's less than half full. If I use it as a heart rate sensor on the weekend, it will last about 6 hours. If you use it fully at the gym, such as for weight training, using music and GPS, it will run out of battery in 2-3 hours. Also, when downloading music from Amazon Music via Wi-Fi, it will run out of battery in about 30 minutes if you leave it unattended, so it's best to download while charging when using Wi-Fi. From this, I think the battery drains relatively quickly.