Amazon TJCB  
11-01-2021 02:31 am
TJCB Smart NFC Multifunctional Ring IP68 Waterproof and Dustproof Smart Ring Without Charging Magic Ring for IC/ID/NFC Card of Mobile Phone,8
Beautiful and wear-resistant: The hardness of the ring is four times that of the alloy, so it will not wear out due to daily scratches. At the same time, it has excellent refractive index and dispersion properties, so that the whole emits a unique luster.
Function: The fourth-generation smart ring is equipped with multiple sets of RFID smart modules, which can simulate four non-contact sensor cards at the same time. In addition, the newly designed circuit structure greatly reduces the electric field interference between the modules. It can be easily compatible with various card reader devices
Waterproof, dustproof, and drop resistance: IP68 waterproof grade, dustproof, drop resistance, excellent rolling performance, can meet the application requirements of various occasions. No need to charge the battery.
Wide compatibility: The NFC function has been redesigned and now supports IOS and Android systems. It supports almost all mobile applications on the market. Support phone model.
Healthy materials: It is made of microcrystalline zirconium ceramics, mixed with germanium sand, volcanic magnets and FIR energy stones. It has a great contribution to the health of the wearer. FIR energy stones can help people effectively resist electromagnetic waves generated by computers, phones or appliances .
Amazon MUSE HiFi  
MUSE HiFi Bluetooth Receiver for Home Stereo RCA, 3.5mm AUX Wireless Audio Adapter for Home and Car Stereo System,NFC-Enabled
Bluetooth 5.3 Audio Adapter: This Bluetooth adapter can add Bluetooth functionality to your device, allowing you to enjoy wireless audio on devices that previously did not support Bluetooth(such as vintage stereo, speakers, TV, PC, or car stereo). You will be able to enjoy the convenience of the Bluetooth feature but not have to replace them
Rich Interface: In receive mode, this Bluetooth 5.3 receiver not only supports 3.5mm(AUX) and RCA(L/R) audio output, but also allows you to insert a TF card into the Bluetooth audio receiver, and then just turn on the speakers and let the music flow. Plug and play, easier to use
Portable Size Bluetooth Audio Adapter: This Bluetooth receiver & transmitter is smaller and more portable. Working range up to 33ft, not limited by wires. Support Devices: Home stereo, speakers, headphones, earbuds, audio music streaming sound systems, car stereo systems, TVs, PCs, projectors, MP3, MP4 etc.
Simply pair your smart phone or tablet to the Bluetooth audio receiver By Bluetooh( Please search “T59”). And AUX wireless audio adapter built-in chip,you can directly connect with the NFC mobile phone or other support NFC bluetooth device by touch this 3.5mm AUX wireless audio adapter
Dual Device Connection Supported: This aux to bluetooth supports connecting 2 devices simultaneously. You can easily switch devices for calls and music while driving, and change music with your friends at parties.
MUSE HiFi Bluetooth Receiver for Home Stereo RCA, 3.5mm AUX Wireless Audio Adapt
Amazon youyeetoo  
youyeetoo L1 4D 3D LiDAR Scanner, 360 Degree, 30 Meters Scanning Radius, ROS SLAM LIDAR Sensor, for AGV Robot Navigation and Obstacle Avoidance (L1PM (20M))
[3D position + 1D grayscale] L1RM 4D-LiDAR is a 4D lidar rangefinder module, which can be widely used in robots, smart cities, smart toys, logistics and other fields, supporting mapping, positioning, identification, avoidance Implementation of functions such as obstacle, environment scanning, and 3D reconstruction.
[Hight Performance] L1RM 4D lidar has built-in 3-axis acceleration and 3-axis gyroscope IMU modules, supporting a push frequency of 250Hz. The circumferential scanning frequency of L1 is 11Hz, the vertical scanning frequency is 180Hz, and the effective sampling frequency is 21600 points/ Second. L1 not only has excellent performance, but also has high reliability. It can also achieve stable ranging and high-precision mapping under the strong light of 100K lux outdoors.
[360°+90°] L1RM lidar sensor scanner has excellent ultra-wide-angle scanning capabilities. The field of view (FOV) extends to 360° horizontally and 90° vertically. It can realize three-dimensional space detection with a hemispherical field of view, and its application range can be expanded to More commercial scenarios.
[Whole House Dynamic Scanning] L1RM 4D 3D lidar scanner can quickly and accurately obtain the three-dimensional structural information of the whole house, which facilitates the positioning and autonomous navigation of mobile robots, and can help the robot expand richer functions such as whole-house cleaning and organization.
[Low Blind Zone] L1RM 4D lidar sensor has an ultra-low blind zone and a minimum detection distance of 0.05m, making it easy to achieve close range detection and recognition. It also supports non-repetitive static scanning. Through omnidirectional ultra-wide-angle non-repetitive scanning, high-precision point cloud data can be obtained to achieve image-level scanning effects.
[WIKI] http(s)://wiki.youy
youyeetoo L1 4D 3D LiDAR Scanner, 360 Degree, 30 Meters Scanning Radius, ROS SLA
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