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The 70mai Dash Cam Pro Plus+ A500S + Rear Cam Set (also known as the A500S Dual Channel Dash Cam) is a budget dual-channel dash cam from 70mai (Xiaomi ecosystem brand), offering front 1944P (2.7K) recording and rear 1080P coverage for comprehensive vehicle surveillance. Released in 2021 with ongoing firmware updates (latest in 2025 improving app stability and GPS accuracy), it’s ideal for commuters seeking ADAS safety alerts, GPS tracking, and parking mode without breaking the bank. The Sony IMX335 sensor delivers sharp daytime footage with decent night vision via WDR and 3D DNR, though the rear cam lags in low light.
Key Specifications
Category Details Front Camera 1944P UHD (2592×1944@30fps) Sony IMX335 5MP sensor, 140° FOV, f/1.8 aperture, 6-glass lens, HDR/WDR for exposure balance Rear Camera (RC06) 1080P Full HD (1920×1080@30fps) Sony IMX415 sensor, 130° FOV, f/2.0 aperture (sold in set or separate ~$20) Night Vision Night Owl Vision with 3D DNR + WDR; good color retention in low light, but rear softens in darkness Storage Up to 128GB microSD (UHS-I U1/V30 recommended; ~10-15GB/hour in dual mode); loop recording overwrites old files Connectivity Built-in Wi-Fi (2.4GHz for app), Bluetooth 5.0, GPS logger (speed/route overlays); 70mai app (iOS/Android) for live view/downloads Power 5V/2A USB; lithium-ion battery (up to 20 min unplugged); hardwire kit for 24H parking (time-lapse front only) Dimensions & Weight Front: 3.4 x 2.0 x 1.7 in (87 x 51 x 43 mm), 2.5 oz (70g); Rear: 1.3 x 1.3 x 0.9 in (33 x 33 x 23 mm), 0.7 oz (20g) Other 2″ IPS LCD screen, voice control, G-sensor (impact lock), ADAS (lane departure/collision warnings), operating temp: 14°F to 140°F Performance and Features
- Video Quality: Front excels with vibrant, detailed clips (license plates readable ~50ft day/30ft night); dual mode maintains 1944P front but drops rear to basic 1080P—solid for evidence in accidents/rear-ends. H.265 compression saves space without quality loss.
- ADAS & Safety: Lane departure and forward collision alerts via app (calibrate on straight roads); GPS stamps speed/location for claims. Parking mode triggers on motion/impact, with time-lapse for efficiency (hardwire required).
- App & Usability: 70mai app enables Wi-Fi previews, sharing, and OTA updates; voice commands (“Record” or “Photo”) for hands-free. Easy 360° lens rotation for interior/rear tweaks; reverse cam mode switches views.
Pros and Cons
Pros Cons Affordable dual-channel with sharp 1944P front and GPS/ADAS Rear night vision mediocre; lithium battery vs. supercap Easy app control, loop recording, and parking mode (w/ kit) App can lag on older phones; occasional Wi-Fi reconnects Compact, rotatable lenses; voice/G-sensor features Max 128GB storage (vs. 256GB on newer models like A810) Bundles with card/hardwire; reliable for evidence ADAS alerts finicky in curves; no 4G/cloud native



