LILYGO® TTGO T-Energy ESP32 8MByte PSRAM WiFi & Bluetooth Module 18650 Battery ESP32-WROVER-B Development Board

Hardware Specifications
Chipset ESPRESSIF-ESP32-WROVER-B 240MHz Xtensa® single-/dual-core 32-bit LX6 microprocessor
FLASH QSPI 4MB Flash / 8MB PSRAM
SRAM 520 kB SRAM
KEY reset,BOOT
switch BAT switch
Power indicator lamp red
USB to TTL CP2104
modular interface SD card、UART、SPI、SDIO、I2C、LED PWM、TV PWM、I2S、IRGPIO、capacitor touch sensor、ADC、DACLNA pre-amplifier
on-board clock 40MHz crystal oscillator
working voltage 2.3V-3.6V
working current about 40mA
sleep current 1mA
working temperature range -40℃ ~ +85℃
size 91.10mm*32.75mm*19.90mm

Power Supply Specifications
Power Supply : USB 5V/1A
charging current : 1000mA
battery 3.7V lithium battery

Wi-Fi Description
Standard FCC/CE/TELEC/KCC/SRRC/NCC(esp32 chip)
protocol 802.11 b/g/n/e/i (802.11n，speed up to150Mbps)A-MPDU and A-MSDU polymerization，support 0.4μS Protection interval
frequency range 2.4GHz~2.5GHz(2400M~2483.5M)
Transmit Power 22dBm
communication distance 300m

Bluetooth Description
protocol meet bluetooth v4.2BR/EDR and BLE standard
radio frequency with -98dBm sensitivity NZIF receiver Class-1,Class-2&Class-3 emitter AFH
audio frequency CVSD&SBC audio frequency