1.Bluetooth specification: version 1.2/22.Frequency:2.4GHZ ISBN band (2.402-2.480MHZ)3.Support file: handsfree & headset profile4.RF output power:-6 to +4dBm5.RF sensitivity:>75dBm6.Distance: up to 10

1. Either nip on the neckline or neck-cloth, elegant and simple2. CSRV2.03. Frequency band: 2.40 ~ 2.48GHz4. Talk time: up to 6 hours; standby time: up to 200 hours5. Broadcasting range of 10m (30&quo

Product Name: Wireless Headfree Earphone (BTF03)Model Number: BTF03Place of Origin: China1. Either nip on the neckline or neck-cloth, elegant and simple2. CSRV2.03. Frequency band: 2.40 ~ 2.48GHz4. Ta

1. Either nip on the neckline or neck cloth, elegant and simple2. CSRV2.03. Frequency band: 2.40 ~ 2.48GHz4. Talk time: up to 6 hours; standby time: up to 200 hours5. Broadcasting range of 10m (30&quo

1. Either nip on the neckline or neckcloth, elegant and simple2. CSRV2.03. Frequency band: 2.40 ~ 2.48GHz4. Talk time: up to 6 hours; standby time: up to 200 hours4. Broadcasting range of 10m (30 feet

Product Name: Wireless Headfree Earphone(BTF04)Model Number: BTF04Place of Origin: China1. Either nip on the neckline or neckcloth, elegant and simple2. CSRV2.03. Frequency band: 2.40 ~ 2.48GHz4. Talk

Product Name: Wireless Headsfree Earphone (BTF07)Model Number: BTF07Place of Origin: China1. Either nip on the neckline or neck cloth, elegant and simple2. CSRV2.03. Frequency band: 2.40 ~ 2.48GHz4. T

Features:1. Offering a comfortable fit and small but generous design2. Quicker connections, better audio quality, adaptive frequency hopping3. After pairing, automatically links to Bluetooth technolog

Product Name: Wirless Headfree (BTF01)Model Number: BTF01Place of Origin: ChinaFeatures:1. Offering a comfortable fit and small but generous design2. Quicker connections, better audio quality, adaptiv