Exterior Screen display: 5 * 7 matrix LED Shell material: ABS + TPU CPU: Xtensa Lx6, dual-core, 240MHz Operating system: FreeRTOS performance Support BT V4.2, WIFI: 2. 4G, 802. 11b / g / n / e / i Support 32G MicroSD card Control Bound mobile phone: Android, Apple system. Operation mode: touch sensor + key + voice Speech recognition: Mandarin battery 3600mAH, 18650 lithium polymer battery. Automatic shutdown after 20 minutes of no operation Standby time 7-10 days Charging time 5 ~ 7 hours