There's a new Chinese device brand in the super-hot gadgets marketplace here\u2014 Riversong Technology. This mobile accessory company has debuted its own series of high-definition earphones. These are the SoundFit wireless sports earphones and Deep Bass Earphone, competitively priced in the value-for-money range. The SoundFit is Bluetooth-enabled and comes with a mic for calls; the in-built mic and physical button of Deep Bass Earphone for calls makes it completely hands-free. Both the products come enclosed in an elegant design that users would like to flaunt. Here are some of their key features. SoundFit (Rs 1,699) The SoundFit is powered by an 80mAh Li-Po battery and has a frequency range of 20Hz-20kHz. With the adjustable hook, you will find this pair of earphones a perfect audio companion for your workout adventures. It is supported by Bluetooth (4.1) which assures a good connection with your mobile phone. It even has a waterproof USB port with a stream call and in-built mic facility which will also work well when you are surrounded by other noises. The device\u2019s multi functional button will ensure that you don\u2019t need to take out your smartphone. The earphones also support voice playback functionality and come with IPX4 certification for protection against damage from water. Deep Bass Earphone (Rs 399) On the other hand, the Riversong Deep Bass is a pair of wired earphones which ships with 20mm drivers and comes with an impedance of 16 ohms. The earphones can operate across a frequency range of 20Hz-20KHz and boast a sensitivity of 107dB. Connected to your mobile, this wired earphone offers decent sound quality. With its deep bass system you can pump up the bass of your music.