Type: Dual Balanced armature type
Input impedance: 43 Ω (1k Hz )
Sensitivity: 106 dB/mW
Maximum input: 100 mW
Playback frequency: 4 – 20,000 Hz
Weight: 0.3 oz (not including cable)
Cable length: 51" OFC cable
Plug: 3.5mm gold-plated mini plug

In the box:

Denon AH-C400 Music Maniac In-Ear Headphones
Silicon ear tips (XS, S, M, L), Double Solid Silicon ear tips (S, M, L), and Comply™ TX-400M foam ear tips
Carrying case with carabiner