More models are available TK103: B00AHTDL9QTK103B: B00AIGJFVQIntroduction: This tracker TK102-B is Upgraded version of the TK102,which has big built-in memory, When the tracker devices lost GSM signal or fall offline from GPRS, tracker will store the tracking position information and alerts automatically in the flash upon the pre-set condition, when GSM signal get back, all the event alerts will be auto-sent to the authorized numbers or monitoring platform (server), but the stored tracking data should be loaded to the monitoring platform via SMS command. Applications:1. Vehicle rental / Fleet management etc. 2. Powerful magnet+water proof, adsorbing in the hidden place of car for tracking secretly. Specification: Dim: 64mm x 46mm x 17mm(1.8"*2.5"*0.65")Weight: 50gGPS chip: SIRF3 chipGPS sensitivity: -159dBmGPS accuracy: 5mTime To First Fix: Cold status:45s/ Warm status: 35s/ Hot status: 1sCar charger: 12-24V input / 5V outputWall charger: 110－220V input / 5V outputBattery: Chargeable changeable 3.7V 800mAh Li-ion batteryPackage Includes: 1* GPS Tracker GPS102B 2* Rechargeable Battery1* Wall Charger 1* Battery Charger1* Extra Back Cover with Magnet1* WaterProof Bag1* User Manuals (English) 1* USB Cable1* CD