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1: Regarding product installation, all are non-destructive docking. If there are any problems during the installation, please contact us and don't make your own conclusions. 2: When installing the product, the car must be turned off to install the wiring harness. 3: If you don't know where the wire harness is inserted, you can contact us by taking pictures. 4: All machines are dedicated products for special vehicles, and we can only sell them after installation and verification. 5: If you cannot confirm whether the model can be installed, you can send the picture of the central console to our customer service for confirmation. 6: Product import duties are paid by the buyer。 Compatibility with the original vehicle: 1: Keep the original car CD. 2: The original information system and vehicle air conditioning are retained. 3: Support the original steering wheel multimedia key control. 4: After placing the order, please give me a picture of your car console and tell me what your model is. thank you.

HC4 configuration parameters: 1: 8 core 3G RAM + 32G ROM 2: Android 9.0 3: Resolution: 1024 * 768 4: Bluetooth 4.0: support lossless music/call 5: TDA7850 equalizer 16EQ 6: Built-in Carplay 7: Radio 8: Music playback/video playback 1080P 9: 4G + wifi (external card slot can freely replace the SIM card) 10: AHD rear view camera (connected to the multimedia player display) 11: 2 USB ports 12: Support mobile phone interconnection (Android / iPhone) 13: GPS receiving satellite 14: Audio output + video input (two channels) 15: Built-in Google Chrome, Google Store, support to download third-party Android APP, can have multiple countries to vote, etc., similar to Android tablets PRO-S9 configuration parameters: 1: 8 core 4 / 6GB RAM + 64 / 128GB ROM 2: Android 9.0 3: Resolution: 1024 *768 4: Bluetooth 5.0: support lossless music playback/call 5: Split screen display: support card/media split screen display 6: Broadcasting, AM, FM, RDS are regarded as saved and renamed digital signals, which can accommodate up to 30 radio stations. Chipset NXP7786 / 6686 PHILIPS-the highest reception quality, this tuner is placed in the original radio with high-end cars. Navigation supports all navigation from Android: Yandex, Navitel, iGO, Sygic, Tomtom. Support dual zone function, you can run multiple navigation software and music or video at the same time! 7: Video playback 1080P 8: 4G + wifi (external card slot can freely replace the SIM card) 9: AHD rear view camera (connected to the multimedia player display) 10: 2/3 2.0 USB interface 11: Support mobile phone interconnection (Android phone / Apple phone) 12: GPS + GLONASS (note: cannot be used at the same time, GLONASS is only applicable to Russian customers 13: Audio output + audio input (2 channels) 14: Apple Carplay / Android AUTO 15: Built-in CPU fan 16: With optical fiber output + coaxial output 17: Android system It can perform the basic functions of an Android smartphone and can use multiple third-party applications through the car infotainment interface. Unlike Apple CarPlay, Android Auto supports various third-party calling and messaging applications, including WhatsApp, Facebook Messenger, Skype, and Google Allo Common parameters for all configurations: Multimedia steering wheel button control Compatible with most steering wheel control functions. Easily switch songs, channels and volume levels, providing you with a safer and more interesting journey. Built-in music player/third-party player software: Play music online: MP3, WMA, WAW, AAC, AC3, OGG, FLAC, etc. Built-in video player: Online TV, video: Full HD 1080p, any format: AVI (DivX, Xvid, mpeg4, h.264), MKV, WMV, FLV, WebM, etc. (we recommend providing free MX video player) microphone Built-in microphone Bluetooth Use the Bluetooth phonebook to search and play mobile player music Built-in WiFi module Built-in WIFI 802.11 b/g/n 150 Mbit, with external antenna to improve wifi signal reception. Hengcheng Navigation Store is an officially authorized subsidiary of Lulis, which belongs to Lulis Shop. It is 100% original and authentic. 2. About delivery The product will be shipped within 1-5 days after payment. After payment, AliExpress takes about 12-48 hours to confirm the payment to ensure the security of the agent channel. Please rest assured, once approved, we will deliver as soon as possible. Packages shipped from China will be picked up by the AliExpress logistics team. After arriving in your country, you can check the tracking details on the local post office website. 3. Replace within 365 days This warranty does not apply to damage caused by man-made, misused, misused or modified products. If there is a problem within 7-15 days after receiving the product, we will directly replace you with a new machine. The seller bears all transportation costs. If the product has a problem within one year after receiving the product, we will provide a free warranty and bear the cost of replacement parts. The buyer bears the freight. But please contact us first to solve after-sales problems. 4. Back You can apply for "no fair return within 15 days". The goods returned by the buyer will not affect the seller’s secondary sales, and the costs incurred by the return and exchange will follow the principle of responsibility. 5. About feedback If you have any questions, please contact us in advance, we will try our best to help you solve it as soon as possible. In addition, if you are satisfied with the product after receiving and testing it, please provide us with five-star feedback, which will help others understand the product. Thank you for your feedback and support