1. Material: ABS resin
2. Dimensions: receiver 9.5x6.5x3 cm, transmitter 8x4.5x2 cm
3. Weight: about 40 grams
4. Working distance: about 100 meters
5. Waterproof: IP44
6. Power supply mode: transmitter contains 23A 12V battery, receiver 2 x AA batteries (need to purchase by yourself)
7. Applicable scenarios: family residences, office buildings, hospitals, restaurants, etc.
8. Features: good signal, strong penetrating power, no wiring required, easy installation, flashing lights for incoming bell, durable

1. Foam protective plate, effectively protecting the telescope
2. Bracket connection hole, external tripod support
3. Can be used in night observation mirrors of microscopes, telescopes, binoculars and monoculars.
4. Metal material, durable
5. Size: about 15 x 6.5 x 4cm
6. Weight: about 92g
7. Note:only bracket, no others

Details:
1. Material: plastic, alloy
2. Screen size: 2.4 inches
3. Weight: about 300 grams
4. Lens pixels: 1 million
5. Dimensions: host 11x7.4x1.8 cm, camera 6x6x1.5 cm
6. Viewing angle: 120 degrees
7. Recording mode: taking photos
8. Power supply: 3 x AAA dry batteries (need to purchase by yourself)
9. Applicable door hole diameter: 15-50 mm
10. Applicable door thickness: 35-105 mm
11. Applicable scenarios: family, villa, factory
12. Note: Expansion memory card is not supported, without PIR function (without automatic capture function)
Features:
1. Built-in memory, circular storage, no need to insert a memory card
2. Press the doorbell to take pictures and record visitors, which is safer
3. 2.4-inch display, 1 million high-definition pixels, more clear shots
4. With infrared night vision function, it can also record at night
5. 120 degree wide-angle field of view, recording more clearly
6. Alloy material, anti-theft and anti-theft
7. 3 kinds of polyphonic ringtones, easy to set, easy to install, and widely applicable

1. Four operation modes: constant current operation; constant voltage operation; constant power operation; constant resistance operation
2. This time, a flexible input wiring port design is adopted. Users can manually connect different adapters to achieve different measurement functions to extend the functions
3. Automatically generate measurement data reports, stop voltage and time-limited discharge
4. First turn off the load switch "OFF", measure the current battery no-load voltage, and then turn on the load switch "ON" through the setting key. At this time, you can read the internal resistance parameters of the current battery. The internal resistance of this table is calculated by the formula: (no-load voltage-load voltage)/current current=battery internal resistance
5. Long press the setting key, and then short press the setting key when it flashes to switch to time-limited discharge for timing setting to obtain the effect of worry-free discharge aging. The time-limited discharge can be set to count down for any length of 1-99 hours and 59 minutes. When the set time is reached, the discharge will automatically stop. It can be used as a timer to turn off the constant current discharge aging function
Real-time display of internal and external dual temperature measurement data, three intelligent safety protections
6. Test various USB data cables/chargers. First, use a data cable to connect the corresponding interface of the load device, and then use the DC power cable and Android cable to connect to the "Micros input detection port". Then adjust the current by setting the button to detect the voltage drop of the data cable and the performance stability of the charger.
7. Test various DC power adapters, and the 2.4-inch high-definition large color screen displays data clearly.
8. The four-wire wiring method, the voltage measurement is not affected by the voltage drop of the wire, making the voltage measurement more accurate.
9. Easily test various data such as voltage/current/capacity of various lithium batteries/batteries.
10. Long-term 180W load discharge aging test, the temperature is kept at about 50-80 degrees.
11. Adopting intelligent temperature control light effect fan design, built-in large discharge tube, more powerful and more reliable, test the overall capacity of the battery, usage time, aging performance, etc.

Online method:
1. For Apple mobile phone APP: Please search E_test directly in the App Store to download and install, then click the Bluetooth APP icon to open the software, click the Bluetooth icon above the software to enter and select DL24-BLE to connect, and you can realize the remote wireless remote control setting and measurement function of the mobile phone. You can check the discharge status on the mobile phone at any time, various data cleaning can be seen, discharge voltage, current and power curves, etc. (No need to pair Bluetooth separately, just select DL24 directly from the software Bluetooth icon)
2. Applicable to Android mobile phone APP: Scan the QR code on the back of the host to download the corresponding APP software. After installation, open the software and click the Bluetooth icon to enter and directly select DL24-BLE to successfully connect and use (no need to pair Bluetooth separately, just select DL24 directly from the software Bluetooth icon)
3. Computer wired connection APP: After the host is powered on, use the data cable provided to connect to the computer USB port, then install the CH340 serial port driver, and then scan the QR code on the back of the host to download the corresponding APP software. After installation, open the software and select the newly installed serial port model to successfully connect and use. Of course, this APP style with installation method is also compatible with the serial port devices of Bluetooth devices
4. Computer Bluetooth wireless connection APP: First add the Bluetooth device as the serial port device of DL24-SPP on the computer, then scan the QR code on the back of the host to download the corresponding APP software and store it. You can directly open the software and select the newly added Bluetooth serial port model to successfully connect and use it without installation.