Product Name: HiFi Sound True Wireless Headphone Auto Paring Bluetooth Tws Wireless Stereo Earbuds for iPhone and Android I9,I9s, I10, I12 ,I15,I18,I19,I20,I21,I22,I23,I24 Model NO.: EB11 Distance version: Class B Specifications: Support Hsp / Hfp / A2dp/Avrcp Characteristics: Tws V5.0 Function: Bluetooth Soundtrack: Dual Track Bluetooth Version: 5.0 Usage: Mobile Phone, Call Center, MP3 & MP4, Computer, Game Player, Aviation, DJ Style: In-ear Power Input: DC 5V Charging Bin: 400 mAh Headphone Battery: Single Side 55mAh Call Time: 4 Hours Music Time: 4 Hours Frequency: 20Hz ~ 20kHz Bluetooth Distance: 20 Meters Trademark: Neutral Transport Package: Carton Origin: China HS Code: 8518301000 Product Description Specification:1. Chipset: Jieli 6936B 5.0 + EDR2. Function:Auto Power on / Pairing,Touch Control. Quick Pairing, Extremely stability, Purely Superior Sound3. Material: ABS+PC 4. Distance: 20-30 Meters 5. Speaker: 16Ω,10mm, 20-20kHz, 91.5dB±36. Battery: Polymer Lithium Battery, Earbuds (55mah), Charging case (400mah) 7. Playing time: Single: 5-6H ; Pairing Mod: 4-5H 8. Standby: Single 100H, Pairing Mod 60H 9. Charging: Earbuds 1H, Case 2H 10. Color: Gray/Black