G20S 1The 2.4G wireless Gyroscope function 2Plug and play 3The Air mouse function 4The Voice control function 5The Infrared learning function(you can learn it through the power button) 6 ) No Backlight G20S PRO 1 ) Backlight buttons 2The Infrared learning function(you can learn it through the power button) 3The Voice control function 4The Air mouse function 5Plug and play 6The 2.4G wireless Gyroscope function G20S Pro BTS-G20BTS Plus 1Insert USB Dongle can work in BT5.0/2.4G wireless Gyroscope function, No USB Dongle only can work With BT5.0 2Plug and play 3The Air mouse function 4The Voice control function 5The Infrared learning function(you can learn it through the power button) 6) Backlight buttons After-sales About Shipment: 1.We will send the items within 4-5 days once your payment is completed. 2.We do not guarantee delivery time on all international shipments due to differences in customs clearing times in individual countries, which may affect how quickly your product is inspected. About Customs Notice : 1.Please note that buyers are responsible for all additional customs fees, brokerage, fees, duties, and taxes for importation into your country. These additional fees may be collected at time of delivery. We will not refund shipping charges for refused shipments. 2.The shipping cost does not include any import taxes, and buyers are responsible for customs duties. 3.About customs clearance: For countries that are difficult to pass through customs, such as: Brazil, Chile,Turkey, Argentina, etc. Make sure you have the ability to pass customs. We do not give a refund if the buyer cannot go through customs and Customs deducts the package.4.If your place is remote ,then need to pay 38usd . About Returns: 1.We do our best to serve our customers the best that we can. 2.We will refund you if you return the items within 15 days of your receipt of the items for any reason. However, the buyer should make sure that the items returned are in their original conditions. If the items are damaged or lost when they are returned, the buyer will be responsible for such damage or loss, and we will not give the buyer a full refund. The buyer should try to file a claim with the logistic company to recover the cost of damage or loss. 3.The buyer will be responsible for the shipping fees to return the items. About Warranty & Maintenance: 1.We offer the 1-month free replacement. Buyers may request for a replacement within 15 days from your receipt of the product. The buyer should return the product in the original conditions to us and should bear the shipping costs for return. 2.We also provide one year free maintenance. The buyer should return the product in the original conditions to us and should bear the shipping costs for return. If any part is required to be replaced, the buyer should also pay for the costs of the parts to be replaced. 3.Before returning the items, please confirm the return address and the logistics method with us. After you give the items to the logistic company, please send us the tracking number. As soon as we receive the items, we will repair or exchange them ASAP. About Feedback: 1.Your satisfaction and positive feedback is very important to us. Please leave positive feedback and 5 stars if you are satisfied with our items and services. 2.If you have any problems with our items or services, please feel free to contact us first before you leave negative feedback. We will do our best to solve any problems and provide you with the best customer services.