Output power: 1 KHZ THD10 %<br>USB device function: for the machine charge. Frequency response: 170 hz - 20 KHZ<br>TF card, support MP3 songs<br>Speaker: solid double track<br>Bluetooth connection broadcast function<br>Signal to noise ratio: 90 db or higher<br>FM radio FM digital radio, radio broadcast memory.<br>Lithium battery: 4.2 V600mA/H battery<br>The whole machine working time about 4 to 5 hours<br>Material: ABS + silica gel<br>Rated charging time: about 3-4 hours<br>Distortion: 1% or less<br>Rating: 3 w<br>A bluetooth connection distance: 10 meters or more<br>Operating voltage: 3.7 V<br>Product size: 146 * 54 * 31 mm<br>Charging voltage: dc 5 v<br>Item 300 G in weight<br>Bluetooth hands-free mobile phone<br>The last time allocated calls the callback function<br>Accessories mountaineering buckle 1, audio data line 1, line 1 a, 1 in this manual<br /></p> <br /></p><p style="text-align: center;"><img src="https://contestimg.wish.com/api/webimage/5743b1e2b851355d859d14d6-1-original.jpg" alt=""width="800" noproxy><p style="text-align: center;"><img src="https://contestimg.wish.com/api/webimage/5743b1e2b851355d859d14d6-2-original.jpg" alt=""width="800" noproxy><p style="text-align: center;"><img src="https://contestimg.wish.com/api/webimage/5743b1e2b851355d859d14d6-3-original.jpg" alt=""width="800" noproxy><p style="text-align: center;"><img src="https://contestimg.wish.com/api/webimage/5743b1e2b851355d859d14d6-4-original.jpg" alt=""width="800" noproxy><p style="text-align: center;"><img src="https://contestimg.wish.com/api/webimage/5743b1e2b851355d859d14d6-5-original.jpg" alt=""width="800" noproxy><p style="text-align: center;"><img src="https://contestimg.wish.com/api/webimage/5743b1e2b851355d859d14d6-6-original.jpg" alt=""width="800" noproxy><p style="text-align: center;"><img src="https://contestimg.wish.com/api/webimage/5743b1e2b851355d859d14d6-7-original.jpg" alt=""width="800" noproxy><p style="text-align: center;"><img src="https://contestimg.wish.com/api/webimage/5743b1e2b851355d859d14d6-8-original.jpg" alt=""width="800" noproxy><p style="text-align: center;"><img src="https://contestimg.wish.com/api/webimage/5743b1e2b851355d859d14d6-9-original.jpg" alt=""width="800" noproxy><p style="text-align: center;"><img src="https://contestimg.wish.com/api/webimage/5743b1e2b851355d859d14d6-10-original.jpg" alt=""width="800" noproxy><p style="text-align: center;"><img src="https://contestimg.wish.com/api/webimage/5743b1e2b851355d859d14d6-11-original.jpg" alt=""width="800" noproxy>