Pair of portable wireless speakers equipped with Bluetooth V4.1 TWS (True Wireless Stereo) technology that enables user to use two speakers pairing to form a wireless left channel and right channel system to deliver true stereo sound effect and therefore much more powerful and balanced sound. Up to 10 meters operating distance makes the use flexible, while the IPX4 waterproof function enables speakers to be suitable for various outdoor and workout conditions. They also feature a 3.5mm line input for connection of non-Bluetooth devices. Other functions include voice dialling/redialling and VOIP connectivity with computer for online chat, battery indicator on iOS devices and voice prompt in English and Chinese. The speakers provide a music playtime of up to 5 hours and talk time of up to 12 hours. They also come supplied with carabiners for hooking on backpacks or bags, two USB charging cables and one audio cable (3.5mm to 3.5mm). Frequency response: 70 Hz-20 kHz. Dimensions: 84.5 x 54 x 40.5 mm. Weight: 164 g (one piece). Black colour design.