Firmware 3.0 Update: Experience enhanced seek sensitivity with the Si4732-ESP32 ATS Mini Receiver's latest firmware. This update ensures smoother station tuning and easier upgrades, keeping your device up-to-date with the newest features. Built-in Hi-Z Circuit and Headphone Amplifier: Enjoy superior sound quality and volume with the built-in Hi-Z Circuit and Headphone Amplifier in the SI4732+ESP32 pocket radio. Tailor your listening experience with adjustable bandwidth, AGC ATTN, and soft mute settings. Compact and Loaded with Features: This mini radio, measuring just 3*1.4*0.8 inches, is ideal for outdoor enthusiasts. Despite its small size, it packs a punch with robust features suitable for any adventure or casual listening. High Sensitivity and Anti-Interference: The combination of ESP32 and SI4732 chips in this sw radio ensures exceptional sensitivity and strong anti-interference capabilities. Enjoy clear reception across all frequencies and precise tuning with the adjustable BFO in SSB mode. Vibrant and Clear Display: The full band radio receiver features a 1.9-inch IPS color screen with adjustable brightness. Its compact size and long-lasting 800mAh battery make it perfect for both indoor and outdoor use, supporting up to 10 hours of listening. Specifications: SI4732 Mini Radio Main Control Unit: ESP32-S3-N16R8 Chip: S14732 Screen: 1.9-inch color screen Battery: 800mAh lithium battery Battery Life: 12 hours at volume level 40 Charging Method: TYPE-C (phone charging port, no charging cable, fast charging adapter not recommended) Headphone: 3.5mm standard headphone jack (with headphone amplifier chip) Speaker: Built-in 2030 (8 ohms 1W) Casing: ABS Dimensions: 80mm*35mm*20mm (excluding knob height) Bands: SW, LW, SSD, LSB, AM, FM modes (aviation band requires additional tuner)