The 3G4G Blog: Different flavours of Bluetooth: 4.0, 4.1, Low Energy, Smart, Smart Ready...
IOGEAR - GBU522 - Mini USB Dual-Mode Bluetooth 4.0 Transmitter
Serial Bluetooth 4.0 BLE Module - iBeacon
Vox 40 Bluetooth Headset - Tellur
How to Create an Arduino Compatible Bluetooth 4.0 Module : 8 Steps (with Pictures) - Instructables
MPOW Swift Bluetooth 4.0 Headphones review - The Gadgeteer
SM-R860NZSAXAA | Galaxy Watch4, 40mm, Silver, Bluetooth | Samsung Business US
Down4sound - BassBX G01 - 40 WATT Portable Bluetooth Speaker (BLACK) - Down4Sound Shop
Amazon.com: Nokia Essential Wireless Headphones - Universal Bluetooth - 40 Hours Playback - Soft Leather Over Ear with Foldable Headband,Black : Electronics
Turtle Beach Stealth 700 Gen 2 MAX Wireless Multiplatform Gaming Headset - Xbox X, Xbox S, Xbox One, PS5, PS4, Windows 10 & 11 PCs, NSW – Bluetooth, 40+ Hour Battery, 50mm Nanoclear Speakers, Black - Walmart.com
Mini USB Bluetooth 4.0 Dongle - 50m - Bluetooth & Telecom Adapters | StarTech.com
THX-40 Bluetooth Headset – Thronmax Microphones | Vertigain® Technology
TP-Link UB500 USB 2.0 Bluetooth 5.0 Nano USB Adapter - Walmart.com
JBL Charge 5 - Speaker - for portable use - wireless - Bluetooth - 40 Watt - 2-way - black | Dell USA
USB Bluetooth 4.0 Micro Adapter for PC [v4.0 Class 2 with Low Energy T - Sabrent
THX-40 Bluetooth Headset – Thronmax Microphones | Vertigain® Technology
Bluno Mega 2560 - Arduino Mega 2560 Compatible - Bluetooth 4.0 - DFRobot
JBL Charge 5 - Speaker - for portable use - wireless - Bluetooth - 40 Watt - teal | Dell USA
TUNES2GO KoolMAX 40 qt. Blue Wheeled Cooler, Bluetooth PA System and Power Station CA-E065A - The Home Depot
Amazon.com: Wireless Earbuds Bluetooth 5.3 Headphones 40 Hrs Playtime with LED Display, Deep Bass Stereo and Noise Cancelling Bluetooth Ear Buds IP7 Waterproof Wireless Earphones with Mic for iPhone Android White : Electronics
Amazon.com: Kinivo BTH240 Bluetooth Headphones with BTD-400 USB Bluetooth PC Adapter (Black, Bluetooth 4.0, Compatible with Windows, Raspberry Pi, Linux, On-Ear, Hands-Free Calling, Built-in Mic, Foldable) : Electronics
Orico USB Bluetooth 4.0 Adapter - Black - Orico
Tribit Stormbox Pro 40-Watt Bluetooth Speaker; 360-degree Sound : A. T. Guys, Your Access Technology Experts
CBT40NANO Bluetooth 4.0 Class 1 USB Adapter - Conceptronic
