Sony Wireless in-ear headphones, wired behind the head with enhanced bass reproduction. Connection via bluetooth ver. 5.0. Range 10 m, frequency 2.4 GHz. Frequency 20-20 000 Hz. Supports SBC, AAC codecs. Profiles A2DP, AVRCP, HFP, HSP. SCMS-T content protection. Integrated 12 mm neodymium speaker with enhanced bass reproduction. Integrated microphone, can be used as hands-free. On the headphones, volume control, play / pause, skip to previous and next track. Battery life 15 hours. Charging time approx. 3 hours. Support USB-C fast charging function - 10 minutes charge = 60 min playback. LED charging and power on. Siri and Google voice assistance. Weight 21 grams. Lightweight headphones with extra bass for deep, bold sound WI-XB400 headphones from Sony are part of the extra bass range. They improve low frequencies for bass sound, but keep clear vocals and lift each song on the waves of booming rhythms. Wireless streaming stream your favourite songs from a paired smartphone or tablet using bluetooth wireless technology. Enjoy up to 15 hours of uninterrupted music listen to your favourite playlists all day with 15 hours of full charge. Add energy with fast charging when the battery is low, only 10 minutes of charging with a Type-C cable will give you 60 minutes of playback. That means you'll soon be able to play something again, even if you're in a hurry. Listen in comfort - anywhere, anytime. The soft and flexible neckband is shaped to allow comfortable all-day wear. And when you're done listening, you can roll up or pack your headphones and easily put them in your bag or pocket. Magnetic tips for easy carrying each handset has a built-in magnet for carrying and storing without tangled cables. That means they won't interfere with you when you're not listening to your mouth. Easy to operate with buttons and use the buttons to start or stop playback, browse tracks and change the volume. Compatible with voice control press once to connect to the voice control of your smartphone to control navigation, play music and communicate with contacts. Easy hands-free calling built-in microphone and hands-free talking for a relaxing conversation. You don't even have to pull your phone out of your pocket. Specifications Weight: 21 g headphone Type: Closed, dynamic Speaker: 12 mm Magnet: Neodymium Frequency response (Communication Through bluetooth ): 20 – 20,000 Hz (sampling frequency 44.1 kHz) Volume Control: Yes Wearing style: With neckband battery charging time: About 3 hours (full charge) battery charging method: USB Type C battery life (continuous music play): Max. 15 h (full charge) battery time (continuous communication time): Max. 15h (full charge) battery life (wait time): Max. 200 h (full charge) bluetoth version: Bluetooth Specification Version 5.0 Effective range: Direct visibility approx. 10 m frequency range: 2.4 GHz band (2.4000-2.4835 GHz) Profile: A2DP, AVRCP, HFP, HSP audio format supported: SBC, AAC supported content protection type: SCMS-T package dimensions / weight: 15,5 x 9,3 x 4 cm / 0,108 kg