Easyly measure the output voltage of the USB power and the device operating current or load voltage. Features All features you get from the box : Easy to use and practical. Compact and easy to carry, no additional power supply, plug and play. It can easily measure the output voltage of the USB port and the device. operating current or load voltage. Detect any USB charger such as PC USB, home charger, car charger. Wide range of applications, any phone, any electronic product, Easy to use. suitable for factories, laboratories and personal use. Spesifikasi : Dimension 2.09 in x 1.34 in x 0.59 in (5.3 cm x 3.4 cm x 1.5 cm) Others Voltage: 3v-7v error 0.1v Current:0-2.5A error 0.01A Review : Produk yg bisa dipakai untuk mengetahui brp besar voltase amp; ampere dari charger, usb port amp; kabel usb, dengan toleransi kesalahan deteksi yang masih cukup kecil. Kita bisa tahu mana yang memang sudah rusak/perlu diganti, khususnya charger/usb port. Sangat berguna untuk mengecek third party power bank dan charger yang dijual di pasaran. Ternyata banyak charger dan powerbank yang voltasenya melebihi batas wajar ( gt;5.20 volt) dan membuat IC regulator amp; batere handphone cepat panas dan akhirnya rusak.