Features : 9000mAh Battery. 9.7*6.9*3.1cm,255g , GSM four frequency bands + GPS tracking. Solar power charge automatically. (Power on under the sunlight itself.) Waterproof IP67. Timing switch. Anti-remove alarm. SOS alarm. High frequency alarm with loudspeaker. Historical route display/ Geo-fence. Voice monitoring. Low battery alarm/SIM card changing alarm. High-power LED Warning Light. Track with Web platform/ APP/ WeChat/ SMS commands.