Bluetooth Protocol Meet bluetooth v42BR/EDR and BLE standard Radio frequency With -97dBm sensitivity NZIF receiver Class-1,Class-2&Class-3 emitter Audio frequency CVSD& audio frequency Product Hardware Specifications Chipset ESPRESSIF-ESP32 240MHz Xtensa single-/dual-core 32-bit LX6 microprocessor FLASH QSPI flash 4MB SRAM 520 kB SRAM Button Reset USB to TTL CP2104 Modular interface UART,SPI,SDIO,I2C,LED PWM,TV PWM,I2S,IRGPIO,ADC,capacitor Contact sensor,DACLNA pre-amplifier Display IPS ST7789V 114 Inch Working voltage 27V-42V Working current About 60MA Sleep current About 120uA Working temperature range -40 ~ +85 Supply Specifications Supply USB 5V/1A Charging current 500mA Battery 37V lithium battery JST Connector 2Pin 125mm USB Type-C Wi-Fi Standard FCC/-RED/IC/TELEC/KCC/SRRC/NCC Protocol 80211 b/g(80211n,speed up to150Mbps)A-MPDU and A-MSDU polymerization,support 04S Protection interval Frequency range 24GHz~25GHz(2400M~24835M) Transmit 22dBm Communication distance 300m colour: black Material: metal + PC size: 5152x2504x854mm Package Contents: 1 x T-Display 1 x charging cable 2 x PIN pins Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.