Check your model of crosley briefcase, this is for 9V version. Crosley have many different versions of the briefcase record player so make sure this is the right one for your player.
eBay
Mini USB WiFi Adapter 150Mbps, 2.4GHz Wireless Network Dongle for PC/Mac/Linux/Set Top Box, 802.11n/b/g Plug & Play
Aliexpress UK
eBay
WIFI 6 USB Dongle Mini USB Wifi Adapter 300Mbps Drive free 2.4G Wi-Fi Adapter Plug and Play For PC Deskop Windows 7 10 11
Aliexpress UK
9V 3A AC-DC Switching Adapter Charger Plug for Polaroid Z2300 Camera
eBay
Goelely RJ45 1000Mbps External Network Card Ethernet Adapter for 4K Chromecast Google TV Stick LED Display Type-C Plug&Play
Aliexpress UK
Output: DC 9V 1A. (2) To better protect the circuit, extended service life, and make faster transmission. Input: AC 100-240V, 50-60Hz.
eBay
Type-C Bluetooth 5.1 Audio Transmitter Plug And Play Wireless Low Latency Adapter For Nintendo Switch PS4 TV PC Type C Receiver
Aliexpress UK
There is no extra cost for UK islands. The item photographed may not be the item you will receive.
eBay
9v Power Supply 9v uk Plug 0.5A 0.6A 0.8A 1A 9v dc 500ma Plug 9v 0.6a 9v Power Supply au Plug Source 600mA 800mA 5.5*2.5mm
Aliexpress UK
Output: DC 5V 1A/5V 2A/12V 1A/12V 2A/12V 3A. Input: AC 100-240V, 50-60Hz.
eBay
Power Supply Adapter Charger DC 5V 6V 9V 12V 2A, AC 110V 220V AC DC Power Adapter DC Plug Converter EU US with 8pcs Connect Plug
Aliexpress UK
Output: DC 9V 1A - positive polarity. Lead Size: 1.5m / 150cm.
eBay
DC 5V 6V 9V 12V 2A Power Supply Adapter Charger AC 110V 220V AC DC Power Adapters DC Plug Converter EU US with 8pcs Connect Plug
Aliexpress UK
(Connector / tip size : 2.0x0.5mm,2.4x0.7mm,3.5x1.35mm. Output Power: 18 W or below. Your RELIANCE and SUPPORTING are our great honor. automatically close your account if you accumulate 4 UPI's total.).
eBay
AC-DC 100V-240V Power Adapter 3V 4.5V 5V 6V 8V 9V 12V 13V 15V 1A Universal Power Adapter Supply Charger adapter Eu Us Plug
Aliexpress UK