Remote control distance: > 2km @ 22dbm, , Item Name: TX16S Mark II MAX Radio Controller, Display: 4.3-inch TFT full-colour touch display with a resolution of 480 * 272, Gimbal: AG01 Hall, Upgrade method: Supports USB-C online / SD card offline upgrade, Working voltage: 6.6-8.4v DC, Transmitter module: Option 1: Internal 4-in-1 multi-protocol module (CC2500 CYRF6936 A7105 NRF2401)； Option 2: Internal ELRS (SX1280), Working current: 400mA, Color: Carbon Fiber Black/Carbon Fiber Red, Module Bay: JR compatible module bay, Gimbal: Option 1: V4.0 Hall sensor with Aluminium fascia; Option 2: AG01 CNC Hall sensor, Transmitting power: Internal 4-in-1 multi-protocol module: Max 100mw (protocol dependent); Internal ELRS: Max 250mw (transmitting power is adjustable), Channels: Up to 16 channels (depending on the receiver), Transmission frequency: 2.400GHz-2.480GHz, Module Firmware: Multiprotocol- Module (4IN1) -OR- ExpressLRS (ELRS), Version: 4-IN-1/ELRS, Weight: 750g (without battery), Antenna gain: 2db (transmit power adjustable), , Size: 287x129x184mm, Radio firmware: EdgeTX, Brand Name: RadioMaster.
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
Click here to search by yourself. Here are coupons that you can use.
Updated:
Banggood
Warehouse in China.
Link: RadioMaster TX16S Mark II MAX AG01 4-IN-1 ELRS RC Controller
$386.99 with coupon: BGRADIORU
$395.59 with coupon: BGRCParts8
Additional Banggood coupons:
1. First page
2. Second page
Price history and price alert
Check out price history chart (for all/most countries) for RadioMaster TX16S Mark II MAX AG01 4-IN-1 ELRS RC Controller. The lowest price was: $386.99.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).