Color: Black - Rubber material - Band length: 24cm - 1.4" OLED display - Check longitude and latitude location via GSM network - Built-in GSM / GPS module - GSM module: 850/900/1800/1900MHz - GPS sensitivity: -163dBm - GPS center frequency: L1 1575.42MHz - GPS locating accuracy: 5~25 meters - GSM locating accuracy: 100~500 meters - Speed accuracy: 0.1m/s - Time: Synchronized with GPS time - Default data: WGS-84 - Hot start: 1 second - Cold start: 38 seconds - Max altitude: 18000 meters - Max speed: 515 m/s - Built-in microphone - Supports continuous tracking - Features: alarm / remote monitoring / quick dial / SMS position checking - Language: Simplified Chinese / English - Built-in 600mAh lithium battery - Accessories: - 1 x AC 100~240V power adapter (2-flat-pin plug) - 1 x USB cable (13.5cm) - 1 x Software CD