Main Features:  -1800R Curved Screen: colorful laser light, large HD mirror screen, mechanical axis button, frosted shell, time function display.  -HIFI Sound Quality: covers the full range of high, medium and low, with surround sound effects.  -HD Full Frequency Speakers: 6W*2 high-power dual speakers + dual diaphragm.  -Smart Compatibility: compatible with mobile phones, computers, tablet Bluetooth devices.  -5.0 Bluetooth Technology: using Bluetooth smart chip, the sound quality is clearer and more natural.  -Multiple Playback Methods: support AUX audio cable, TF card, U disk, Bluetooth, USB sound card connection and playback.  -Alarm Clock Function + Clock Function: equipped with digital display, clock display and alarm display.  -4000mAh Long Battery Life: high-performance Large-capacity Lithium Battery,Standby for about 24 hours,Use about 6 hours.    Standard Version is: 1744490 (Bluetooth 5.0 + Double Speakers, Double Diaphragm + Colorful Lighting Effects + Heavy Bass + Mirror Design).  Clock Version is: 1744535 (Bluetooth 5.0 + Double Speakers, Double Diaphragm + Clock Display + Heavy Bass + Mirror Design + Long Battery Life).  Game Version is: 1744255 (Bluetooth 5.0 + Double Speakers, Double Diaphragm + Colorful Lighting Effects + Clock Display + Heavy Bass + Mirror Design + Long Battery Life).    Specification:  Version: Game Version;  Audio Input Mode: AUX, USB, TF card, Bluetooth, FM playback, PC mode;  USB/TF: Support 32GB;  Bluetooth Version: V5.0;  Bluetooth Receiving Distance: ≥10m;  Charging Input DC: DC5V/1A-2A;  Resolution: ≥60db;  Signal to Noise Ratio: ≥70db;  Distortion: ≤10%;  Frequency Response Range: 80HZ-20KH;  Speaker Impedance: 4Ω x 2;  Speaker Power: 6W x 2;  Control Method: Mechanical Axis Button;  Working Temperature: 0℃-45℃;  Support MIC Socket: Yes;  Battery Information: Battery Type: Li-ion battery;  Battery Capacity: 3600mAh;  Dimension: Package Weight: 1.32kg;  Product Size: 49.50 x 8.80 x 5.70 cm;    SH39 can be upgraded to the international version:  1) Unzip UPDATA.RAR and place it under the root directory of the TF card.  2) Insert the TF card after turning on the SH39 machine, and it will enter the automatic upgrade state.  3) Wait for about 3 seconds, there will be three beeps and the light will flash off once the upgrade is successful.  4) Take out the TF card, restart it and it will be OK.