Works on 4G / CAT-1 network (global 4G CAT1) for fast connectivity. Supports GPS + BDS (BeiDou) dual positioning systems for better accuracy. Working voltage range: DC 9V – 100V, so usable across many vehicle types. Device dimensions: ~ L 80 mm × W 32 mm × H 15 mm (varies slightly in variants). Positioning accuracy: < 5 meters under good signal conditions. IP65 weatherproof / dust & splash resistant casing. RedGPS +2 Built-in backup battery (~100 mAh) capable of lasting up to ~180 minutes when main power off. SEEWORLD +1 Alarm & security features: vibration alarm, power cut / tamper alarm, over-speed alarm, power failure alarm Remote fuel / engine cut-off / power control ability (if supported in wiring) ACC detection & track playback capability (i.e. detecting ignition on/off, history playback)