A3 1.43 inch IP67 Waterproof 4G Android 8.1 Smart Watch Support Face Recognition GPS 1. Support WiFi, Bluetooth 4.2, gravity sensor, pedometer, heart rate sensor, barometer, blood pressure, blood oxygen, ECG, thermometer, watch version of Sogou input method, watch version of Alipay, watch version of WeChat, timer switch, Watch QQ, support face recognition 2. Sports mode: outdoor running, outdoor walking, indoor running, playing badminton, playing basketball, playing table tennis, playing football, skipping rope, cycling 3. Bluetooth connection to the mobile phone, mobile phone incoming calls, message push, the name of the mobile app is Lekuquan 4. Audio format: MP3AACAAC+WMADRAAMR-NB 5. Image format: JPG, JPEG, BMP 6. Video decoding format: 1920x1080 @30fps; (H.264MPEG4) encoding and decoding; supported formats MPEG4 Encoder, H.264 Encoder, MPEG4 Decoder, H.263 Decoder, VP8 Decoder, H.264 Decoder 7. Front camera: 200w 8. Rear camera: 200w 9. Battery type 650mAH 10. Power adapter Input: AC100-240V.50-60HZ, Output: DC5V 1A 11. Parameters: - Operating system: Android8.1 - Processor type: Spreadtrum SL8541E, Quad-core ARM? CortexTM A53 MP processor, up to 1.4GHz - Graphics processor: GPU Mali 820 MP1 680MH - Storage: 533 MHz LPDDR3, eMCP2+16, 4+64 - Positioning: Support GPSBeidouGranas - UIM card: support nano card - Display: round 1.43 inches 400x400 - 2G network: GSM B2B3B5B8 - 3G network: WCDMA: B1B2B5B8 - 4G network: LTE_FDD: B1B2B3B5B7B8B20, LTE-TDD: B38394041(100MHz) 12. Languages: Japanese, Korean, English, French, German, Italian, Dutch, Portuguese, Spanish, Swedish Czech, Danish, Polish, Russian, Turkish, Hebrew, Thai, Hungarian, Romanian, Arabic, Vietnamese, Hindi