The T-Echo is the latest device to be release by LILYGO® supporting a low power consumption microcontroller. This is the white color, WITH BME280 Humidity and Pressure Sensor. Picture shows both sides of device, only 1 unit included in sale. firmware file: firmware-t-echo-1.x.x.uf2 TTGO's GitHub page for the T-EchoLILYGO SKU H511 Features​ nRF52840 - Bluetooth BLE 5.0, NFC and very low power consumption SX1262 - LoRa transceiver 1.54" eInk display L76K - GNSS receiver - Supporting GPS, BeiDou, GLONASS & QZSS Reset, Program and capacitive touch buttons U.FL antenna connector Includes BME280 Humidity and Pressure Sensor Comes with a case and battery Dev board return policyDevelopment boards are specialty items that generally cannot be resold on return, especially if the firmware has been flashed. Defective boards can be replaced or returned for refund within 30 days of purchase. Non-defective boards can be returned in the same time frame if in like-new condition with a 20 percent restocking fee applied. If the board has had altered firmware or became bricked due to a non-standard firmware flash, the board may not be eligible for return. Sales tax is required in many states and will be added at checkout if applicable to your delivery state. Tax exempt forms can be sent to our support department.