Power button, balanced port and single ended port.
*Upside down photos, but you get the idea and can see the various ports etc.
Power charge (micro usb), micro usb port and iOS port.
General information from the Hidizs website: https://dh1000.hidizs.net/
`Equipped with a high-end ARM with two micro-USB ports; leverages unrivalled FPGA, dual ESS ESS9018K2M DACs and dual ESS ESS9601 high-quality amplifier chips in processing and embedding, DH1000 delivers excellent audio formats up to 24-Bit/192KHz. Perfectly compatible with iPhone, Android phones, iPad, PC, MAC, it will turn your all devices into the luxury stereo system.`
`Most other amplifiers use one DAC for both left and right channel. Hidizs DH1000 used two top-level ES9018K2M DACs for each channel to make sure the signals will not interference each other.
`Dual ES9018K2M DACs for a silky smooth sound
Dual ES9601K high-quality decoder chips
Headphone impedance: 8 to 600Ω
Stainless steel/Aluminium alloy body
Elegant tempered glass cover
Support most high-resolution audio formats, at up to 192kHz/24Bit, DSD/64/128
Perfectly compatible with iPhone, Android phones, iPad, PC, MAC
Custom made crystal oscillators
3.5mm and 2,5mm headphone jacks
12 hours playing time